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  • Date:08MondayApril 2019

    Emergence and stability of a Brownian motor

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    Time
    14:15
    Location
    Edna and K.B. Weissman Building of Physical Sciences
    Room A
    Lecturer
    Alex Feigel
    Hebrew University
    Organizer
    Department of Physics of Complex Systems
    Statistical Physics Seminar
    Contact
    AbstractShow full text abstract about A Brownian motor rectifies thermal noise and creates useful ...»
    A Brownian motor rectifies thermal noise and creates useful work. Here we address how this machine can emerge without predefined energy minimum in a system out of thermal equilibrium. Intuitively, Brownian motor as any artificial or biological machine should degrade with time. I will show that on contrary, a system with multiple degrees of freedom out of thermal equilibrium can be stable at a state that generates useful work.

    It is demonstrated with the help of ab initio analysis of a modified Feynman-Smoluchowski ratchet with two degrees of freedom. Out of thermal equilibrium, an environment imposes effective mechanical forces on nano-fabricated devices as well as on microscopic chemical or biological systems. Thus out of thermal equilibrium environment can enforce a specific steady state on the system by creating effective potentials in otherwise homogeneous configuration space.

    I present an ab initio path from the elastic scattering of a single gas particle by a mechanical system to the transition rate probability between the states of the system with multiple degrees of freedom, together with the corresponding Masters-Boltzmann equation and the average velocities of the system’s degrees of freedom as functions of the macroscopic parameters of the out-of-equilibrium environment. It results in Onsager relations that include the influence of the different degrees of freedom on each other.

    An interesting finding is that some of these forces persist even in a single temperature environment if the thermodynamic limit does not hold. In addition, the spatial asymmetry of the system’s stable state, together with the corresponding directed motion, may possess preferred chiral symmetry.

    Lecture
  • Date:08MondayApril 2019

    Foundations of Computer Science Seminar

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    Time
    14:30 - 16:00
    Title
    Stoquastic PCP vs. Randomness
    Location
    Jacob Ziskind Building
    Room 155
    Lecturer
    Alex Grilo
    CWI
    Organizer
    Faculty of Mathematics and Computer Science
    Faculty of Mathematical Sciences Seminar, Department of Computer Science and Applied Mathematics
    Faculty of Mathematical Sciences Seminar, Department of Mathematics
    Faculty of Mathematical Sciences Seminar
    Contact
    DetailsShow full text description of The derandomization of MA, the probabilistic version of NP, ...»
    The derandomization of MA, the probabilistic version of NP, is a long standing open question. In this talk, we connect this problem to a variant of another major problem: the quantum PCP conjecture. Our connection goes through the surprising quantum characterization of MA by Bravyi and Terhal. They proved the MA-completeness of the problem of deciding whether the groundenergy of a uniform stoquastic local Hamiltonian is zero or inverse polynomial. We show that the gapped version of this problem, i.e. deciding if a given uniform stoquastic local Hamiltonian is frustration-free or has energy at least some constant, is in NP. Thus, if there exists a gap-amplification procedure for uniform stoquastic Local Hamiltonians (in analogy to the gap amplification procedure for constraint satisfaction problems in the original PCP theorem), then MA = NP (and vice versa). Furthermore, if this gap amplification procedure exhibits some additional (natural) properties, then P = RP.
    Lecture
  • Date:10WednesdayApril 201911ThursdayApril 2019

    Advanced Electron Microscopy Symposium

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    Time
    08:00 - 08:00
    Location
    David Lopatie Conference Centre
    Kimmel Auditorium
    Chairperson
    Sharon G. Wolf
    Organizer
    Department of Chemical Research Support
    Contact
    Conference
  • Date:10WednesdayApril 2019

    Cut along dotted line: kirigami materials and device applications

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    Time
    11:00 - 12:00
    Location
    Perlman Chemical Sciences Building
    Room 404
    Lecturer
    Prof. Max Shtein
    Professor of Materials Science and Engineering, Chemical Engineering; University of Michigan
    Organizer
    Department of Materials and Interfaces
    Contact
    AbstractShow full text abstract about Simple 2-dimensional cut and fold patterns can be transforme...»
    Simple 2-dimensional cut and fold patterns can be transformed into 3-dimensional shapes upon stretch-ing. We use this simple approach to develop mechanical metamaterials with several interesting proper-ties and applications. I will describe ways of tuning properties via geometric structure, and discuss ex-amples of how this can be used to achieve superior performance in mechanics, photonics, electronics, sensors, and other areas.

    References:
    “Dynamic kirigami structures for integrated solar tracking.” Nature Comm. 6, 8092 (2015)
    “A kirigami approach to engineering elasticity in nanocomposites through patterned defects.” Na-ture Mater., 14 (2015) 785
    “An Electric Eel-Inspired Artificial Soft Power Source from Stacked Hydrogels.” Nature, 552 (2017) 214

    Lecture
  • Date:11ThursdayApril 2019

    Prof. Barak Dayan - The second Quantum revolution: How the strangest effect in nature gives rise to new technologies

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    Time
    12:00
    Title
    The second Quantum revolution: How the strangest effect in nature gives rise to new technologies
    Location
    Dolfi and Lola Ebner Auditorium
    Lecturer
    Prof. Barak Dayan
    Organizer
    Department of Media Relations
    Homepage
    Contact
    DetailsShow full text description of The lecture is in Hebrew...»
    The lecture is in Hebrew
    Lecture
  • Date:11ThursdayApril 2019

    Special Guest Seminar with prof. Johannes Herrmann

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    Time
    12:00
    Title
    Mitochondrial Biogenesis: A huge challenge for eukaryotic cells
    Location
    Arthur and Rochelle Belfer Building for Biomedical Research
    Botnar Auditorium
    Lecturer
    Prof. Dr. Johannes Herrmann
    Department of Cell Biology, University of Kaiserslautern, Germany
    Organizer
    Department of Molecular Genetics
    Guest Lecture
    Contact
    Lecture
  • Date:11ThursdayApril 2019

    Applying cancer unique metabolism for patients’ diagnosis and therapy

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    Time
    14:00 - 15:00
    Title
    Cancer Research Club
    Location
    Max and Lillian Candiotty Building
    Auditorium
    Lecturer
    Dr. Ayelet Erez
    Depasrtment of Biological Regulation Weizmann Institute
    Organizer
    Department of Biological Regulation
    Contact
    Lecture
  • Date:14SundayApril 201915MondayApril 2019

    Viruses, gene therapy and cancer

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    Time
    08:00 - 08:00
    Location
    David Lopatie Conference Centre
    Kimmel Auditorium
    Chairperson
    Moshe Oren
    Contact
    Conference
  • Date:14SundayApril 2019

    TBA

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    Time
    11:00
    Location
    Sussman Family Building for Environmental Sciences
    M. Magaritz Seminar Room
    Lecturer
    Ehud Meron
    Ben Gurion University
    Organizer
    Department of Earth and Planetary Sciences
    Contact
    Lecture
  • Date:15MondayApril 2019

    Life Science Colloquium

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    Time
    11:00 - 12:00
    Title
    TBD
    Location
    Dolfi and Lola Ebner Auditorium
    Lecturer
    Prof. Gregg Gundersen
    Columbia University Medical Center
    Organizer
    Life Sciences
    Contact
    Colloquia
  • Date:16TuesdayApril 2019

    The mechanics of malaria parasite invasion of the red cell (and beyond): seeking a balanced view of parasite-host contributions to entry

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    Time
    10:00 - 11:00
    Location
    Nella and Leon Benoziyo Building for Biological Sciences
    Auditorium
    Lecturer
    Prof. Jacob Baum
    Imperial College London, Dept. of Life Sciences.
    Organizer
    Department of Biomolecular Sciences
    Contact
    AbstractShow full text abstract about Entry of the malaria parasite merozoite, the micron sized ce...»
    Entry of the malaria parasite merozoite, the micron sized cell responsible for blood-stage malaria infection, into the human red blood cell defines establishment of malaria disease. The process is rapid yet contains a great depth of cell biology, one eukaryotic cell actively penetrating the other. Entry has long been seen as a very parasite-centric process with the merozoite literally driving its way into a passive erythrocyte. This is in marked contrast to other pathogens that utilise host-cell phagocytosis to gain entry to human cells. Has this inbalanced view been over-stated in the case of the merozoite? Recent data from several groups suggests that erythrocyte biophysics (including membrane biophysical properties) also contributes to the process of merozoite entry. Here, I will present our latest insights into the role of both parasite and host cell factors and how they might be contributing to lowering the energy barrier required to get the merozoite inside the human red blood cell. With a particular focus on cell imaging, I will present our vision of invasion being a balanced equation with parasite motor force and host membrane deformability both contributing to allow the blood-stage malaria parasite (and may be beyond the blood stages) get in.
    Lecture
  • Date:16TuesdayApril 2019

    Exploring the evolutionary origin of histone-based chromatin organisation

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    Time
    14:00 - 15:00
    Location
    Helen and Milton A. Kimmelman Building
    Dov Elad Room
    Lecturer
    Dr. Tobias Warnecke
    Molecular Systems Group MRC London Institute of Medical Sciences (LMS) & Imperial College London
    Organizer
    Department of Structural Biology
    Contact
    Lecture
  • Date:17WednesdayApril 2019

    Brain connectivity in Health and Pathology

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    Time
    08:00 - 08:00
    Location
    David Lopatie Conference Centre
    Chairperson
    Yonatan Katz
    Contact
    Conference
  • Date:17WednesdayApril 2019

    Developmental Club Series 2018-2019

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    Time
    10:00
    Location
    Arthur and Rochelle Belfer Building for Biomedical Research
    Botnar Auditorium
    Lecturer
    Yonatan Stelzer
    Organizer
    Department of Molecular Genetics
    Developmental Club
    Contact
    Lecture
  • Date:18ThursdayApril 2019

    Physics Colloquium

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    Time
    11:15 - 12:30
    Location
    Edna and K.B. Weissman Building of Physical Sciences
    Auditorium
    Lecturer
    Federica Petricca
    Max Planck Munich
    Organizer
    Faculty of Physics
    Contact
    DetailsShow full text description of 11:00 – coffee, tea, and more...»
    11:00 – coffee, tea, and more
    AbstractShow full text abstract about TBA ...»
    TBA
    Colloquia
  • Date:28SundayApril 2019

    Flow inside and above coral reefs: an interesting example of a canopy flow problem

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    Time
    11:00
    Location
    Sussman Family Building for Environmental Sciences
    M. Magaritz Seminar Room
    Lecturer
    Uri Shavit
    Technion
    Organizer
    Department of Earth and Planetary Sciences
    Contact
    Lecture
  • Date:29MondayApril 201930TuesdayApril 2019

    Cellular Signaling in Health and Disease

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    Time
    08:00 - 08:00
    Location
    Max and Lillian Candiotty Building
    Auditorium
    Chairperson
    Rony Seger
    Organizer
    Department of Biological Regulation
    Contact
    Conference
  • Date:30TuesdayApril 2019

    To be announced

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    Time
    10:00 - 10:30
    Location
    Nella and Leon Benoziyo Building for Biological Sciences
    Auditorium
    Lecturer
    Eita Rotem
    Department of Biomolecular Sciences-WIS
    Organizer
    Department of Biomolecular Sciences
    Contact
    Lecture
  • Date:30TuesdayApril 2019

    To be announced

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    Time
    10:30 - 11:00
    Location
    Nella and Leon Benoziyo Building for Biological Sciences
    Auditorium
    Lecturer
    Nitan Samra
    Department of Biomolecular Sciences-WIS
    Organizer
    Department of Biomolecular Sciences
    Contact
    Lecture
  • Date:01WednesdayMay 2019

    Developmental Club Series 2018-2019

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    Time
    10:00
    Location
    Arthur and Rochelle Belfer Building for Biomedical Research
    Botnar Auditorium
    Lecturer
    Prof. Benny Shilo
    Organizer
    Department of Molecular Genetics
    Developmental Club
    Contact
    Lecture

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