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  • Date:22ThursdayApril 2021

    Atmospheric Dynamics on Jupiter: New Results from the Juno Mission

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    Time
    11:15 - 12:30
    Location
    https://weizmann.zoom.us/j/94477142638?pwd=aWNlZGVzNmdJdnJVZVNZUi9sZ0VBZz09
    Lecturer
    Yohai Kaspi
    WIS
    Organizer
    Faculty of Physics
    Contact
    AbstractShow full text abstract about NASA's Juno Mission is now completing its 5 year nomina...»
    NASA's Juno Mission is now completing its 5 year nominal mission around Jupiter, orbiting the planet in an eccentric polar-orbit every 53 days. One of the prime mission objectives is better understanding the atmospheric dynamics through gravitational, microwave, infrared and magnetic measurements. In this talk, we will focus on three new results explaining different aspects of the dynamics on Jupiter. First, infrared imaging data revealed that Jupiter’s poles are surrounded by 5 cyclones around the North Pole and 8 cyclones around the South Pole. We explain the location, size and stability of these circumpolar cyclones based on vorticity dynamics. Second, using microwave data, revealing Jupiter’s deep ammonia abundance structure, we show that Jupiter has 8 meridional circulation cells in each hemisphere. These cells resemble in their governing physics Earth's midlatitude Ferrel cells, and relate to the observed red and white belts and zones at Jupiter’s cloud-level. Finally, using Juno’s gravity measurements we constrain the depth of Jupiter’s east-west jet-streams, and the depth (mass) of the most iconic vortex in the Solar system — Jupiter’s Great Red Spot. Overall, this unique multiple instrument dataset allows now explaining the governing physics of several outstanding aspects of Jupiter’s internal and atmospheric dynamics. We will also compare the dynamics to those of Saturn, generalizing some of the this new understanding.
    Colloquia
  • Date:22ThursdayApril 2021

    Therapeutic Exploitation of Metabolic Vulnerabilities of Cancer

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    Time
    14:00 - 15:00
    Lecturer
    Prof. Eyal Gottlieb
    Ruth and Bruce Rappaport Faculty of Medicine, Technion – Israel Institute of Technology
    Organizer
    Dwek Institute for Cancer Therapy Research
    Cancer Research Club
    Contact
    DetailsShow full text description of https://weizmann.zoom.us/j/5065402023?pwd=a3Z6KzRCU0xJaUFoM2...»
    https://weizmann.zoom.us/j/5065402023?pwd=a3Z6KzRCU0xJaUFoM2Y5emZwZm1oZz09
    Lecture
  • Date:25SundayApril 2021

    “Elastic-mediated interactions between cells”

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    Time
    11:00 - 12:00
    Lecturer
    Prof. Shelly Tzlil
    Faculty of Mechanical Engineering, Technion
    Organizer
    Department of Molecular Chemistry and Materials Science
    Soft Matter and Biomaterials
    Contact
    AbstractShow full text abstract about Zoom Link: https://weizmann.zoom.us/j/97324532197?pwd=MGoxSG...»
    Zoom Link: https://weizmann.zoom.us/j/97324532197?pwd=MGoxSGhJODNWQ2ZGT1p4elJjMG9lZz09

    Cell-cell communication is essential for growth, development and function. Cells can communicate mechanically by responding to mechanical deformations generated by their neighbors in the extracellular matrix (ECM). The ECM is a non-linear viscoelastic material and therefore mechanical communication is expected to be frequency-dependent. In my talk, I will describe our work on the characteristics and implications of mechanical communication over the ECM.
    Lecture
  • Date:25SundayApril 2021

    Seminar for Thesis defense of Gat Krieger

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    Time
    13:30 - 14:30
    Title
    Evolution of gene regulation in yeast through changes in transcription factor binding and gene expression
    Location
    https://weizmann.zoom.us/j/93751101380?pwd=QWJRQzVSZXVOWitiRWdJU1ZMSlFSQT09
    Lecturer
    Gat Krieger
    Organizer
    Department of Molecular Genetics
    Contact
    Lecture
  • Date:26MondayApril 2021

    Physics-guided machine-learning parameterizations of subgrid processes for climate modeling

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    Time
    14:00
    Location
    https://weizmann.zoom.us/j/7621438333?pwd=c0lpdlQzYSthellXWG9rZnM0ZDRFZz09
    Lecturer
    Janni Yuval
    Earth, Atmospheric and Planetary Sciences MIT school of Science
    Organizer
    Department of Earth and Planetary Sciences
    Contact
    AbstractShow full text abstract about Global climate models represent small-scale processes, such ...»
    Global climate models represent small-scale processes, such as clouds and convection, using subgrid models known as parameterizations. Traditional parameterizations are usually based on simplified physical models, and inaccuracies in these parameterizations are a main cause for the large uncertainty in climate projections. One alternative to traditional parameterizations is to use machine learning to learn new parameterizations which are data driven. However, machine-learning parameterizations might violate physical principles and often lead to instabilities when coupled to an atmospheric model. I will show how machine learning algorithms, such as neural networks and random forests, can be used to learn new parameterizations from the output of a three-dimensional high-resolution atmospheric model, while obeying physical constraints such as energy conservation. Implementing these parameterizations in the atmospheric model at coarse resolution leads to stable simulations that replicate the climate of the high-resolution simulation, and capture important statistics such as precipitation extremes. I will also discuss how machine-learning parameterizations can give further insights into the parameterization problem. Specifically, I will show that failures of machine-learning parameterizations can be used to better understand the relationship between large-scale fields and subgrid processes.
    Lecture
  • Date:27TuesdayApril 2021

    Deposition of Gypsum Deltas at the Holocene Dead Sea by outsalting and paleoclimatic insights

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    Time
    10:00 - 11:00
    Location
    https://weizmann.zoom.us/j/7621438333?pwd=c0lpdlQzYSthellXWG9rZnM0ZDRFZz09
    Lecturer
    Nurit Weber
    Department of Earth and Planetary Sciences Weizmann Institute of Sciences
    Organizer
    Department of Earth and Planetary Sciences
    Contact
    AbstractShow full text abstract about The rapid retreat of the Dead Sea during the past decades le...»
    The rapid retreat of the Dead Sea during the past decades led the exposure of unique structures of massive gypsum and aragonite crusts: large capes pointing towards the open lake (termed here “gypsum deltas”) and numerous small gypsum mounds scattered on the lake’s exposed shores. Geological field relations, 14C and 34S measurements and thermodynamic calculations provide evidence that the gypsum deltas and the mounds were formed during time-intervals of low lake stands (~420±10 m below mean sea level), when sulfate-rich Ca-chloride brines discharged from the coastal aquifer via saline springs, mixed with the Dead Sea brine and precipitated the gypsum. This mixing process describes a mechanism of “gypsum outsalting”, which is completely different from the conventional view of gypsum as a product of evaporative deposition.
    Condition for enhanced saline springs discharge and “gypsum outsalting” occurred in the mid to late Holocene period (~ 6.6 to 0.6 ka), and were mainly intensive at the latest stages of regional aridity cycles when lake level was still low and the Dead Sea salinity was at its highest. The ages of formation of the gypsum structures coincide with times of North Atlantic cooling events and grand solar minima suggesting a direct impact of the latter on the Dead Sea hydrology and high sensitivity of the regional hydrology (controlling lake level) to global solar-related events. The frequency of appearance of the gypsum structures seems to follow the Hallstat Cycle that approached minimum at ~3000 2000 years ago.
    Lecture
  • Date:27TuesdayApril 2021

    To be announced

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    Time
    10:00 - 11:00
    Location
    Nella and Leon Benoziyo Building for Biological Sciences
    Cafeteria
    Lecturer
    Oshrat Galibov Levi
    Dept. of Biomolecular Sciences-WIS
    Organizer
    Department of Biomolecular Sciences
    Contact
    AbstractShow full text abstract about Zoom LInk: https://weizmann.zoom.us/j/95881429481?pwd=Vkxw...»
    Zoom LInk:
    https://weizmann.zoom.us/j/95881429481?pwd=VkxwUmg1Z2ErZmhpZDJqMTZwellGZz09
    Lecture
  • Date:27TuesdayApril 2021

    New Insights on Bioaggregates and the Aquatic N Cycle

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    Time
    11:30 - 12:30
    Title
    Hybrid Guest Seminar
    Location
    Nella and Leon Benoziyo Building for Biological Sciences
    Auditorium
    Lecturer
    Prof. Edo Bar-Zeev
    Roy J Zuckerberg Career Development Chair for Water Research, Department of Environmental Hydrology & Microbiology, Zuckerberg Institute for Water Research (ZIWR), The Jacob Blaustein Institutes for Desert Research (BIDR), Ben-Gurion University of the Negev
    Organizer
    Department of Plant and Environmental Sciences
    Contact
    DetailsShow full text description of Host: Dr. Assaf Gal...»
    Host: Dr. Assaf Gal
    Lecture
  • Date:27TuesdayApril 2021

    Neural correlates of future weight loss reveal a possible role for brain-gastric interactions

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    Time
    12:30 - 13:30
    Lecturer
    Prof. Galia Avidan
    Dept of Psychology Ben Gurion University of the Negev
    Organizer
    Department of Neurobiology
    Contact
    DetailsShow full text description of Zoom link to join: https://weizmann.zoom.us/j/96608033618?p...»
    Zoom link to join:
    https://weizmann.zoom.us/j/96608033618?pwd=SEdJUkR2ZzRBZ3laUUdGbWR1VFJTdz09

    Meeting ID: 966 0803 3618
    Password: 564068

    Host: Dr. Rita Schmidt rita.schmidt@weizmann.ac.il tel: 9070

    AbstractShow full text abstract about Lifestyle dietary interventions are an essential practice in...»
    Lifestyle dietary interventions are an essential practice in treating obesity, hence neural factors that may assist in predicting individual treatment success are of great significance. Here, in a prospective, open-label, three arms study, we examined the correlation between brain resting-state functional connectivity measured at baseline and weight loss following 6 months of lifestyle intervention in 92 overweight participants. We report a robust subnetwork composed mainly of sensory and motor cortical regions, whose edges correlated with future weight loss. This effect was found regardless of intervention group. Importantly, this main finding was further corroborated using a stringent connectivity-based prediction model assessed with cross-validation thus attesting to its robustness. The engagement of senso-motor regions in this subnetwork is consistent with the over-sensitivity to food cues theory of weight regulation. Finally, we tested an additional hypothesis regarding the role of brain-gastric interaction in this subnetwork, considering recent findings of a cortical network synchronized with gastric activity. Accordingly, we found a significant spatial overlap with the subnetwork reported in the present study. Moreover, power in the gastric basal electric frequency within our reported subnetwork negatively correlated with future weight loss. This finding was specific to the weight loss related subnetwork and to the gastric basal frequency. These findings should be further corroborated by combining direct recordings of gastric activity in future studies. Taken together, these intriguing results may have important implications for our understanding of the etiology of obesity and the mechanism of response to dietary intervention as well as to interoceptive perception.
    Zoom link to join:
    https://weizmann.zoom.us/j/96608033618?pwd=SEdJUkR2ZzRBZ3laUUdGbWR1VFJTdz09

    Meeting ID: 966 0803 3618
    Password: 564068

    Host: Dr. Rita Schmidt rita.schmidt@weizmann.ac.il tel: 9070
    Lecture
  • Date:28WednesdayApril 2021

    Spotlight on Science Lecture - Travelling The SILC Road: The Non-Coding Path to Nerve Regeneration

    More information
    Time
    11:00 - 12:00
    Title
    https://weizmann.zoom.us/j/99718325744?pwd=QWJVNGw5cTA5SU1Ed1VVZnViZ0lUQT09 Password: 193088
    Location
    https://weizmann.zoom.us/j/99718325744?pwd=QWJVNGw5cTA5SU1Ed1VVZnViZ0lUQT09
    Lecturer
    Dr. Rotem Ben-Tov-Perry
    Department of Biological Regulation
    Organizer
    Department of Life Sciences Core Facilities
    Contact
    DetailsShow full text description of ZOOM https://weizmann.zoom.us/j/99718325744?pwd=QWJVNGw5c...»
    ZOOM

    https://weizmann.zoom.us/j/99718325744?pwd=QWJVNGw5cTA5SU1Ed1VVZnViZ0lUQT09

    Password: 193088
    AbstractShow full text abstract about Travelling The SILC Road: The Non-Coding Path to Nerve Rege...»
    Travelling The SILC Road:
    The Non-Coding Path to Nerve Regeneration
    Lecture
  • Date:28WednesdayApril 2021

    Algebraic Geometry and Representation Theory Seminar

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    Time
    14:30 - 15:30
    Title
    Isolated unitary unramified representations and the Dirac inequality
    Lecturer
    Dan Ciubotaru
    Oxford University
    Organizer
    Faculty of Mathematics and Computer Science
    Algebraic Geometry and Representation Theory Seminar
    Contact
    AbstractShow full text abstract about I will present several applications of the Dirac inequality ...»
    I will present several applications of the Dirac inequality to the determination of unitary representations of p-adic groups and associated "spectral gaps". The method works particularly well in order to attach irreducible unitary representations to the large nilpotent orbits (e.g., regular, subregular) in the Langlands dual complex Lie algebra. These results can be viewed as a p-adic analogue of Salamanca-Riba's classification of irreducible unitary (g,K)-modules with strongly regular infinitesimal character.
    Lecture
  • Date:02SundayMay 202103MondayMay 2021

    Executive Board and committees meetings 2021

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    Time
    All day
    Location
    Digital platform
    Contact
    International Board
  • Date:03MondayMay 2021

    Magnetic control over chemical bonds in atomic-wires and molecular junctions

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    Time
    11:00 - 12:00
    Location
    https://weizmann.zoom.us/j/98063488104?pwd=N3VqTC9sU1A4RHVDZ1dhOGVxbU1iUT09
    Lecturer
    Prof. Oren Tal
    Department of Chemical & Biological Physics, WIS
    Organizer
    Faculty of Chemistry
    Contact
    AbstractShow full text abstract about Controlling the properties of chemical bonds by an external ...»
    Controlling the properties of chemical bonds by an external stimulus is a central goal in chemistry. At the level of individual bonds, such control was achieved using light, current, electrochemical potential and electric field. In my talk, I will show that the size and direction of applied magnetic fields can affect bond stability, interatomic distance, and bond-formation probability. This behavior is demonstrated in a variety of atomic wires and single-molecule junctions. The revealed magneto-structural phenomena show that the influence of magnetic interactions on chemical bonds can be dramatic in nanoscale systems.
    Colloquia
  • Date:03MondayMay 2021

    Cooperative Carbon Capture in Metal–Organic Frameworks

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    Time
    18:00 - 19:00
    Title
    SAERI - Sustainability and Energy Research Initiative seminar series
    Location
    via zoom
    Lecturer
    Prof. Jeffrey R. Long
    Departments of Chemistry and Chemical & Biomolecular Engineering,University of California, Berkeley, USA
    Organizer
    Feinberg Graduate School
    Alternative Sustainable Energy Research Initiative (AERI)
    Contact
    DetailsShow full text description of Host: Prof. Ron Milo zoom link: https://weizmann.zoom.us...»

    Host: Prof. Ron Milo
    zoom link: https://weizmann.zoom.us/j/98545366579?pwd=dXNocENmcFF6TDhld1JqS0RMcHRvQT09
    Meeting ID: 985 4536 6579
    Password: 12345
    Lecture
  • Date:04TuesdayMay 202106ThursdayMay 2021

    new approaches in virology research

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    Time
    08:00 - 08:00
    Location
    David Lopatie Conference Centre
    Kimmel Auditorium
    Chairperson
    Noam Stern-Ginossar
    Contact
    Conference
  • Date:04TuesdayMay 2021

    To be announced

    More information
    Time
    12:30
    Lecturer
    Ivan E de Araujo
    Mt. Sinai Hospital
    Organizer
    Department of Neurobiology
    Contact
    DetailsShow full text description of Zoom link to join- https://weizmann.zoom.us/j/96608033618?p...»
    Zoom link to join-
    https://weizmann.zoom.us/j/96608033618?pwd=SEdJUkR2ZzRBZ3laUUdGbWR1VFJTdz09

    Meeting ID: 966 0803 3618
    Password: 564068

    Host: Dr. Rita Schmidt rita.schmidt@weizmann.ac.il tel: 9070
    AbstractShow full text abstract about Zoom link to join- https://weizmann.zoom.us/j/96608033618?p...»
    Zoom link to join-
    https://weizmann.zoom.us/j/96608033618?pwd=SEdJUkR2ZzRBZ3laUUdGbWR1VFJTdz09

    Meeting ID: 966 0803 3618
    Password: 564068

    Host: Dr. Rita Schmidt rita.schmidt@weizmann.ac.il tel: 9070

    Lecture
  • Date:06ThursdayMay 2021

    Zoom Lecture: “NMR of RNA: dynamics or in-cells”

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    Time
    09:15 - 10:15
    Lecturer
    Prof. Katja Petzold
    Dept. of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm
    Organizer
    Department of Molecular Chemistry and Materials Science
    Contact
    AbstractShow full text abstract about Zoom Lecture: https://weizmann.zoom.us/j/98819686427?pwd=...»
    Zoom Lecture: https://weizmann.zoom.us/j/98819686427?pwd=algvMEJUNHdvaFppNS9xVzlTUkhYQT09
    Passcode: 551107

    Many functions of RNA depend on rearrangements in secondary structure that are triggered by external factors, such as protein or small molecule binding. These transitions can feature on one hand localized structural changes in base-pairs or can be presented by a change in chemical identity of e.g. a nucleo-base tautomer. We use and develop R1ρ-relaxation-dispersion NMR methods for characterizing transient structures of RNA that exist in low abundance (populations <10%) and that are sampled on timescales spanning three orders of magnitude (µs to s).
    The characterization of three different types of transient structures is going to be presented. 1) The HIV-1 dimerization initiation site (DIS) undergoes large secondary structure rearrangements that provide the basis for a molecular zipper, which can be crucial for genome packaging (Nature 2012). 2) The GU wobble base-pair undergoes a change from standard wobble GU geometry to appear like a Watson-Crick base-pair stabilized by Keto-Enol tautomerization (Nature 2015). 3) a microRNA – mRNA complex changes conformation to activate the RISC complex (Nature 2020).
    I will furthermore give an outlook on recent efforts to measure in-cell NMR of nucleic acids in functional complexes and ribosome dynamics.
    www.petzoldlab.com

    Lecture
  • Date:06ThursdayMay 2021

    Postdocs' colloquium

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    Time
    11:15 - 12:30
    Location
    https://weizmann.zoom.us/j/94477142638?pwd=aWNlZGVzNmdJdnJVZVNZUi9sZ0VBZz09
    Lecturer
    Physics postdoctoral fellows
    Organizer
    Faculty of Physics
    Contact
    AbstractShow full text abstract about TBA ...»
    TBA
    Colloquia
  • Date:10MondayMay 2021

    Chemistry Colloquia

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    Time
    11:00 - 12:15
    Location
    Gerhard M.J. Schmidt Lecture Hall
    Lecturer
    Herbert Waldmann
    Max Planck Institute
    Organizer
    Faculty of Chemistry
    Contact
    Lecture
  • Date:11TuesdayMay 2021

    To be announced

    More information
    Time
    12:30
    Lecturer
    Nancy Kanwisher
    MIT
    Organizer
    Department of Neurobiology
    Contact
    DetailsShow full text description of zoom link to join- https://weizmann.zoom.us/j/96608033618?p...»
    zoom link to join-
    https://weizmann.zoom.us/j/96608033618?pwd=SEdJUkR2ZzRBZ3laUUdGbWR1VFJTdz09

    Meeting ID: 966 0803 3618
    Password: 564068

    Host: Dr. Rita Schmidt rita.schmidt@weizmann.ac.il tel: 9070
    AbstractShow full text abstract about Zoom link to join- https://weizmann.zoom.us/j/96608033618?p...»
    Zoom link to join-
    https://weizmann.zoom.us/j/96608033618?pwd=SEdJUkR2ZzRBZ3laUUdGbWR1VFJTdz09

    Meeting ID: 966 0803 3618
    Password: 564068
    Host: Dr. Rita Schmidt rita.schmidt@weizmann.ac.il tel: 9070
    Lecture

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