Archives de l'auteur: Benoît Roman

Rencontres du Non-Linéaire (Paris 26-28 mars 2019)

9 janvier 2019 – 15 h 47 min

RENCONTRE DU NON-LINÉAIRE (RNL 2019)
du 26 au 28 mars 2019 à Paris, Université Paris-Diderot

La Rencontre du Non-Linéaire rassemble tous les ans l’essentiel de la communauté francophone travaillant sur la dynamique non linéaire (hydrodynamique, optique, plasmas, mécanique, mathématiques appliquées, physico-chimie, biophysique, …).

La 22e Rencontre du Non Linéaire 2019 aura lieu les 26, 27 et 28 mars 2019 à l’Université Paris Diderot, à l’amphithéâtre Buffon, 15 rue Hélène Brion, Paris 13e.

Cette année, les orateurs invités seront :

* Pierre Degond (Imperial College, London) « TBA – Math »

* Dominique Escande (Aix-Marseille Univ.) « TBA – Plasma »

* Pedro M. Reis (EPFL, Suisse) « Unraveling nonlinearities in elastic knots »

* Pierre Suret (Univ. Lille) « Integrable turbulence in optical fibers and 1D water tank experiments »

Cette année, le mini-colloque aura lieu le 26 mars 2019 et pour thème « Geophysical and Astrophysical Fluid Dynamics in the Lab ». Il est organisé par M. Le Bars (IRPHE), S. Fauve (ENS), C. Jaupart (IPGP) et F. Pétrélis (ENS).

Calendrier et renseignements pratiques :
* 21 janvier 2019 : date limite de soumission des résumés pour les exposés longs (~ 20 min)
* 31 janvier 2019 : sélection des exposés longs par le Comité Scientifique
* 25 février 2019 : date limite de soumission des résumés pour les posters/exposés courts
* 27 février 2019 : date limite de soumission des articles pour les comptes-rendus
* 26, 27 et 28 mars 2019 : RNL 2019

* Vous êtes tous conviés à participer à cette manifestation et à présenter une communication.
* L’inscription est gratuite et recommandée pour faciliter le travail des organisateurs. Elle est exigée pour présenter une communication.
* Pour plus d’informations et inscription : http://nonlineaire.univ-lille1.fr/SNL/

——

Le Comité d’Organisation :

E. Falcon, M. Lefranc, F. Pétrélis et C.-T. Pham

Le Comité Scientifique :

S. Barland, J. Barré, E. Bayart, E. Falcon, M.-C. Firpo, D. Gérard-Varet, M. Haragus, R. Marchiano, F. Pétrélis, C.-T. Pham, S. Rafaï, et B. Roman.

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First announcement:

RENCONTRE DU NON-LINÉAIRE (RNL 2019)
from 26 to 28 March 2019 at Paris, Université Paris-Diderot

The « Rencontre du Non-Linéaire (RNL)” gathers every year the French-speaking community working on nonlinear dynamics (hydrodynamics, optics, plasmas, mechanics, applied mathematics, physical chemistry, biophysics, dynamical systems, …).

The 22nd RNL 2019 will take place on March 26th, 27th and 28th, 2019 at the University Paris Diderot, in the amphitheater Buffon, 15 st. Hélène Brion, 75 013 Paris.

Invited conferences:

* Pierre Degond (Imperial College, London) « TBA – Math »

* Dominique Escande (Aix-Marseille Univ.) « TBA – Plasma »

* Pedro M. Reis (EPFL, Suisse) « Unraveling nonlinearities in elastic knots »

* Pierre Suret (Univ. Lille) « Integrable turbulence in optical fibers and 1D water tank experiments »

The satellite meeting, called mini-colloquium, will take place on March 26th, 2019 and will focus on « Geophysical and Astrophysical Fluid Dynamics in the Lab ». He is organized by M. Le Bars (IRPHE), S. Fauve (ENS), C. Jaupart (IPGP), and F. Pétrélis (ENS).

Schedule and practical informations:
* January 21, 2019: deadline of abstract submissions for the long contributions (~ 20 min)
* January 31, 2019: selection of long contributions by the Scientific Committee
* February 25, 2019: deadline of abstract submissions for posters/short contributions
* February 27, 2019: deadline of article submissions for the proceedings
* March 26th, 27th and 28th, 2019: RNL 2019

* You are all urged to participate in the 22nd RNL 2019 and to present a contribution.
* The registration is free and recommended to facilitate the work of the organizers. It is required to present a contribution.
* For more information and registration: http://nonlineaire.univ-lille1.fr/SNL/

——

The Steering Committee:

E. Falcon, M. Lefranc, F. Pétrélis et C.-T. Pham

The Scientific Committee:

S. Barland, J. Barré, E. Bayart, E. Falcon, M.-C. Firpo, D. Gérard-Varet, M. Haragus, R. Marchiano, F. Pétrélis, C.-T. Pham, S. Rafaï, and B. Roman.

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postdoc physics of fracture (Aalto, finlande)

10 décembre 2018 – 13 h 34 min

Dear colleague,

My group is looking for a post-doc candidate in the physics of fracture.

The activities of the group in this regard concern experiments on complexity of fracture mechanics and models / theory to account for observed phenomena.

The position is financed by an Academy of Finland grant on time-dependent fracture. The goals of the post-doc position may be tuned towards the strengths and interests of the person hired, and the aspects may include participation in the design and running of experiments, analyzing experimental data, and focusing in computational models including writing code. An essential part is interacting with others in the group working in related areas.

The Complex Systems and Materials group is located in the Department of Applied Physics at the Aalto University, 10 km (15 min by metro) from Helsinki downtown. The duration of the position is 1+1 years. Post-doc candidates are expected to have a solid knowledge in statistical physics, and have an interest in some mixture of non-equilibrium physics, fracture, and complex systems.

Freeform, 1 page applications plus a CV and the contact info for 2-3 references should be sent by email to mikko.alava@aalto.fi by January 15th, 2019.

Best regards, Mikko Alava

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Postdoc : Morphable structures with varying stiffness (ENS / ESPCI)

10 décembre 2018 – 13 h 33 min

Annonce postdoc en pdf

We have a joint postdoc opening between the MecaWet lab @ PMMH and the Folding, Sliding and Stretching lab @ LPS in the area of controllable multi-component elastic structures, with a focus on experiments. The goal is to design materials whose stiffness may be dynamically adjusted and to explore their use to rigidify morphable 3D structures.

A “baromorph” elastomeric plate morphing into a saddle shape under air suction (left) and into a cone upon inflation (right).

 

Description: By embedding channels within an elastomer we have recently developed structures that change shape under applied pressure. However, their softness hinders applications to large scales. Adding a more rigid component can rigidify the structure, but in a non-linear fashion. The project consists of designing and prototyping multi-component elastic materials with tunable rigidity. The general idea is to control the relative contributions of compliant and stiff components with a third active phase. The goal is to rationalize the fundamental aspects of the problem, to produce bulk materials and to design morphable / rigidizable structures. This multidisciplinary project is at the interface between structural mechanics, fluid dynamics, soft robotics and nonlinear physics.

 

Profile: Candidates should have recently obtained or are about to obtain a Ph.D. in Physics, Mechanical/Civil/Aerospace Engineering, or related disciplines. The project is primarily experimental but also includes some theory and numerical computations. On the experimental side, expertise in rapid prototyping, micro-fabrication, material science, and/or mechanical testing is welcome. In addition, an appreciation for scaling analysis, theory and computation is a plus.

 

Hosting teams: The successful candidate will participate in a collaboration between two laboratories who study problems in fluid and solid mechanics in conjunction with other disciplines: non-linear physics, instabilities, out-of-equilibrium statistical physics, multi-scaled phenomena, geomorphology, planetology… Their research involves a combination of laboratory experiments, theory and numerical simulations.

Although the project is fundamental in nature, we envision applications for medical equipment and, more generally in applied science.

The laboratories are both located in the Latin Quarter, in the center of Paris, which offers state-of-the-art facilities and a unique scientific environment.

 

Funding: Funding for one year is available (through an ANR grant) and we expect the candidate to help us find additional funding for a second year.

 

More details on our scientific activities can be found here:

https://blog.espci.fr/jbico/recherche/ for the MecaWet lab @ PMMH

www.lps.ens.fr/~foldingslidingstretchinglab/ for the Folding, Sliding and Stretching lab @ LPS

 

Contact:

andreotti@lps.ens.fr

benoit@pmmh.espci.fr

 

Applications received by January 15, 2018 will receive equal consideration.

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Reactive transport, mineral dissolution and precipitation in fractured and porous rock: experiments, models and field observations (session à EGU 2019)

10 décembre 2018 – 13 h 32 min

j’aimerais faire la publicité d’une session que je co-organise à la prochaine assemblée de l’EGU à Vienne du 7 au 12 avril prochain:

https://www.egu2019.eu

Reactive transport, mineral dissolution and precipitation in fractured and porous rock: experiments, models and field observations
La date limite pour proposer un abstract est le 10 janvier 2019.

Numero de notre session : HS8.1.7 abstract:
Dissolution, precipitation and chemical reactions between infiltrating fluid and rock matrix alter the composition and structure of the rock, either creating or destroying flow paths. Strong, nonlinear couplings between the chemical reactions at mineral surfaces and fluid motion in the pores often leads to the formation of intricate patterns: networks of caves and sinkholes in karst area, wormholes induced by the acidization of petroleum wells, porous channels created during the ascent of magma through peridotite rocks. Dissolution and precipitation processes are also relevant in many industrial applications: dissolution of carbonate rocks by CO2-saturated water can reduce the efficiency of CO2 sequestration, mineral scaling reduces the effectiveness of heat extraction from thermal reservoirs, acid rain degrades carbonate-stone monuments and building materials.
With the advent of modern experimental techniques, these processes can now be studied at the microscale, with a direct visualization of the evolving pore geometry. On the other hand, the increase of computational power and algorithmic improvements now make it possible to simulate laboratory-scale flows while still resolving the flow and transport processes at the pore-scale.
We invite contributions that seek a deeper understanding of reactive flow processes through interdisciplinary work combining experiments or field observations with theoretical or computational modeling. We seek submissions covering a wide range of spatial and temporal scales: from table-top experiments and pore-scale numerical models to the hydrological and geomorphological modelling at the field scale. We also invite contributions from related fields, including the processes involving coupling of the flow with phase transitions (evaporation, sublimation, melting and solidification).

Sylvain Courrech du Pont
Laboratoire Matière et Systèmes Complexes
Université Paris Diderot
bureau 811A

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Rencontres Mécanique-Physique : matériaux actifs (Congrès Français de Mécanique – Brest Août 2019)

10 décembre 2018 – 13 h 31 min

le Congrés Français de Mécanique se déroulera du 26 au 30 août 2019 à Brest et comprendra en particulier un Mini-Symposium (M1) – Rencontres Mécanique-Physique : matériaux actifs

DEADLINE pour les soumission : le 18 février 2019

M1 – Rencontres Mécanique-Physique : matériaux actifs

Christophe Eloy et Benoît Roman

Une carrosserie dont la forme change sous l’effet de la vitesse, des panneaux solaires qui suivent le soleil à la manière des tournesols… Voici des exemples de matériaux actifs « intelligents » dont la forme est modifiée par la pression, la température, l’humidité, etc. L’objectif de ce mini-symposium est d’avoir un aperçu de la recherche sur ces matériaux actifs, qu’ils soient naturels ou artificiels. Ils posent en effet des questions complexes de mécanique et de physique (grandes déformations, non-linéarités, couplages multi-physiques, instabilités).

Ce mini-symposium, à l’interface entre la science des matériaux, la mécanique des solides, les interactions fluide-structure et la biologie, abordera les thèmes suivants (liste non limitative) : la robotique souple, les matériaux programmables, l’extraction d’énergie de l’environnement, différents types d’actuation, la modélisation de la croissance et de la morphogenèse, etc.

Ce mini-symposium se place sous le double label de l’Association Française de Mécanique (AFM) et de la Société Française de Physique (SFP).

 

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Complex Active and Adaptive Material Systems (26 jan-1 fev, Ventura, Californie)

10 décembre 2018 – 13 h 30 min

Dear Colleagues,

I should like to announce the

Gordon Research Conference & Seminar on

Complex Active and Adaptive Material Systems

Ventura, California, Jan 26th to Feb 1st 2019

Registration and more information at
https://www.grc.org/complex-active-and-adaptive-material-systems-conference/2019/

I hope that you or members of your group will be able to attend.

Enquiries to
Julia.Yeomans@physics.ox.ac.uk
(Conference Chair)

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Journées de physique statistique (31 jan / 1er Fev 2019 – Paris)

26 novembre 2018 – 14 h 06 min

For the 39th time, the « Journées de Physique Statistique » will be organised soon (Thursday Jan 31-Friday Feb 1 2019 at Ens Paris). They will consist of 12 long presentations, the rest of the time being devoted to flash talks as in previous editions.

Essential informations:

1. The meeting is informal, and no financial support will be available.

2. Given the brevity of the flash talks (4 minutes), the essence of the problem and main results only can be presented, without entering into the details.

3. Participation is free. Only those intending to present a flask talk should register.

4. Deadline for registration (http://jstat.phys.ens.fr/) is on ** Dec 20 2018 **

5. Participants who subscribe for flash talks will be recontacted to upload their slides. The corresponding file will be sent in pdf format before Jan 14 2019

6. The programme will be available on Jan 17

More details are available on http://jstat.phys.ens.fr/

We apologize if you have received multiple copies of this announcement.

Cécile Cottin-Bizonne (Univ. Lyon I / CNRS)
Vivien Lecomte (Univ. Grenoble-Alpes / CNRS)
Rémi Monasson (Ens Paris / CNRS)
Emmanuel Trizac (Univ. Paris-Sud / CNRS)
Francesco Zamponi (Ens Paris / CNRS)

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poste (Total) Ingénieur réservoir Microtomographie aux rayons X

26 novembre 2018 – 14 h 06 min

on nous transmet cette offre de poste chez Total:

https://www.linkedin.com/jobs/view/888992890/

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Postdoctoral openings in experimental soft matter at IST Austria

26 novembre 2018 – 14 h 05 min

I am happy to advertise experimental postdoc openings in my new group at IST Austria starting in the summer or fall of 2019. Exceptional candidates will have the opportunity to work on cutting edge projects involving fluid mechanics, triboelectrification, or active matter.

IST offers their postdocs competitive salaries and a variety of generous internal fellowships that can help jumpstart their careers. Additionally, the new physics building has state of the art facilities in a fast growing and highly interdisciplinary setting. Located just outside of Vienna, working at IST also affords its employees the opportunity to live in what is consistently ranked as the ‘most livable city in the world.’

Interested candidates should send a CV (including a publication list and references) as well as a statement of research motivation/interests to swaitukaitis @ gmail.com.

Please kindly post this ad on your department’s notice board or internal listserv, and do not hesitate to contact me with any questions!

Best wishes,
Scott Waitukaitis

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postdoc Why animals learn the way they do? (IRPHE/INMED Marseille)

20 novembre 2018 – 9 h 55 min

http://centuri-livingsystems.org/pdp2018-11/

Why animals learn the way they do?
An experimentally driven computational approach

Supervisors
David Robbe / INMED / david.robbe@inserm.fr
Christophe Eloy / IRPHE / christophe.eloy@irphe.univ-mrs.fr

Abstract
By constantly interacting with their environment, animals are capable of developing adaptive strategies to maximize reward collection, avoid punishments and minimize energy expenditure. The biological algorithms underlying trial-and-error learning are largely unknown. To address this question, we will examine whether different computational models can reproduce the learning dynamics and behavioral strategy of rats in a laboratory-based task. The data to model are already acquired and come from experiments in which animals, engaged in a multi-trial time estimation task, converged progressively towards a conserved embodied strategy. Learning models will be based on classical reinforcement techniques and more recent developments coming from artificial intelligence (deep learning). In this project, the back and forth interaction between experiments and theory will further the understanding of the mechanisms underlying learning and trial-by-trial adjustment in performance.

Keywords
Adaptive behavior; Reinforcement learning; Robotics; Embodiment; Motor learning; Rats; Artificial Intelligence, Machine learning

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