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Invited Talks

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These talks are given by invited speakers at LIPhy. The intended audience is the whole LIPhy. A large general introduction intended for non-specialist is usually provided.

Typical talk duration is around one hour and includes about 15 mn of questions. The talks are scheduled usually every monday at 2PM. The place is at the conference room, second floor. Access to the lab can be obtained through the secretaries.

Agenda

  • Thursday 4 May 11:00-12:30 - Pascal Picart

    LIPHY Seminar

    Résumé :



    contact: Benjamin Cross

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères


  • Monday 15 May 14:00-15:30 - Marc Barthelemy - CEA, Paris

    LIPHY Seminar

    Résumé :



    contact: Chaouqi Misbah

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères


  • Monday 29 May 14:00-15:30 - Maria Consiglia Merola - Stanford University, USA

    Viscoelastic properties of corneal epithelial cells using the “Linear Cell Monolayer Rheometer”

    Résumé : Mechanical properties of cells are determined by complex intracellular structures. In other words, there is a strong connection between biological processes and cellular mechanical response to external stimuli. In fact, cells’ interactions with their living environment are affected by their own mechanical behavior during biological deformations. These interactions, notably adhesion, are crucial to understand the cells adaptation in presence of artificial material such as contact lenses or medical devices.
    During the last decades, different experimental techniques have been used to investigate cell mechanics. Among them, we can mention atomic force microscopy (AFM) and microrheology. While they present a great interest, these techniques are however limited since they can only probe a single cell. In order to overcome the challenges with the biological variation between individual cells, new technologies are thus necessary.
    In this work, we present measurements using a purpose made Linear Cell Monolayer Rheometer (LCMR) that can characterize averaged cell mechanics or averaged cell adhesion. The LCMR enables the investigation of biologically active layers: controlled amounts of live cells with or without artificial materials (e.g., contact lenses). It is used in this study to measure the mechanics of corneal epithelial cells in order to characterize how these cells mechanically deform to external stimuli.
    To simulate physiological conditions, cell mechanics is quantified in experiments in which cells are strained tangential to the cell monolayer. Time-dependent step-strain tests are used to determine the mechanical relaxation of the cell layers.
    The quantification of cell mechanics using the LCMR has the potential for multiple biomedical applications, including disease diagnosis and drug-efficacy screening.



    contact: Claude Verdier

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères


  • Thursday 1 June 11:00-12:30 - Silvio FRANZ - LPTMS Paris

    LIPHY Seminar

    Résumé :



    contact: Giacomo Gradenigo

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères


  • Wednesday 7 June 14:00-15:30 - Stefanos Papanikolaou

    LIPHY Seminar

    Résumé :



    contact: Kirsten Martens

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères


  • Monday 12 June 14:00-15:30 - Kaare Jensen

    LIPHY Seminar

    Résumé :



    contact: Jean-François Louf

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères


  • Monday 24 July 14:00-15:30 - Loïc Tadrist - Laboratoire de microfluidique, Université de Liège, Belgium

    Hydrodynamic Wave-Particle Coupling: Chaos Generated by Non-regular Bounces

    Résumé : Ten years ago, Y. Couder, was studying delayed coalescence of a drop on a vibrated bath. By serendipity he discovered a unique example of macroscopic wave-particle duality: the walkers.
    A droplet deposited on a vertically vibrated bath may, under some conditions, stay in a stable state for which the air layer that separates the drop from the bath is constantly renewed. The droplet never merges with the bath. Under even more restrictive conditions, the waves created by the consecutive impacts of the droplet on the bath interact with the droplet : the droplet is spontaneously propelled. The object compounded of the particle and the waves is called a walker. Scientific debate about the possible analogy between this system and quantum mechanics is still abundant and far from being closed.
    In this talk, I show that the bouncing phase of the droplet in regard to the driving vibration is a crucial parameter for multi-body interactions and chaos generation. At last, I will tell about very first results about the “wavy” potential that rules the interaction between walkers and I will try to show their quantum analog. 



    contact: Jean-François Louf

    Lieu : LIPhy, conference room - 140 Avenue de la Physique 38402 Saint Martin d’Hères


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