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February 18, 2016
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Date:15WednesdayMarch 2017Lecture
Chemical Physics Department Guest Seminar
More information Time 10:00 - 10:00Title Thermalization, Dynamics and Many-Body LocalizationLocation Gerhard M.J. Schmidt Lecture HallLecturer Dr Yevgeny Bar Lev
Columbia UniversityOrganizer Department of Chemical and Biological PhysicsContact Abstract Show full text abstract about Remarkably, a generic interacting system with many degrees o...» Remarkably, a generic interacting system with many degrees of freedom is often well described by a random matrix drawn from an appropriate ensemble, which solely relies on the symmetries of the system. This is one of the central premises of quantum chaos theory which explains the fascinating universality of statistical properties of eigenvalues and eigenstates of generic systems. Such systems, slightly pushed out-of-equilibrium, are
normally expected to relax diffusively. In this talk I will show that disordered and interacting systems which exhibit a many-body localization (MBL) transition, behave in a strikingly different manner than expected from the above tenets in both one dimensional [1,2] and two dimensional systems [3]. These systems thermalize subdiffusively, have a vanishing diffusion coefficient and cannot be described by usual random matrix ensembles
[4]. I will show the implications of these results on thermalization in closed quantum systems, and will derive a general relation between statistical properties of matrix elements of physical observables and a dynamical property of the system [4].
I will finish my talk by presenting some promising future directions [5].
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Date:15WednesdayMarch 2017Lecture
Nucleation, Growth, and Morphology of Molecularly Thin Organic Films at Planar Solid/Vapor Interfaces Prepared from Solute/Solvent Mixtures
More information Time 14:00 - 15:00Location Perlman Chemical Sciences BuildingLecturer Dr. Hans Riegler
Max Planck Institute of Colloids and Interfaces, Potsdam-GolmOrganizer Department of Molecular Chemistry and Materials ScienceContact -
Date:16ThursdayMarch 2017Colloquia
Topological Photonics and Topological Insulator Lasers
More information Time 11:15 - 12:30Location Edna and K.B. Weissman Building of Physical SciencesLecturer Moti Segev
TechnionOrganizer Faculty of PhysicsContact Abstract Show full text abstract about TBA ...» TBA -
Date:16ThursdayMarch 2017Lecture
Spatiotemporal patterning in motor cortex during movement initiation
More information Time 12:30 - 12:30Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. Nicholas Hatsopoulos
University of Chicago Dept of Organismal Biology and Anatomy Chair, Committee on Computational Neuroscience Committee on NeurobiologyOrganizer Department of Brain SciencesContact Abstract Show full text abstract about Voluntary movement initiation involves the modulation of lar...» Voluntary movement initiation involves the modulation of large populations of motor cortical (M1) neurons around movement onset. Despite knowledge of the temporal dynamics of cortical ensembles that lead to movement, the spatial structure of these dynamics across the cortical sheet are poorly understood. Here, we show that the timing in attenuation of the beta frequency oscillation amplitude, a neural correlate of corticospinal excitability, forms a spatial gradient across M1 prior to movement onset with a defined beta attenuation orientation (BAO) from earlier to later attenuation times. We show that a similar propagating pattern is evident in the modulation times of populations of M1 neurons. Using various spatiotemporal patterns of intracortical microstimulation, we find that movement initiation is significantly slowed when stimulation is delivered against the BAO suggesting that movement initiation requires a precise spatio-temporal recruitment pattern in M1. -
Date:16ThursdayMarch 2017Cultural Events
Yuval Hamevulbal - Pinocchio
More information Time 17:30 - 17:30Location Michael Sela AuditoriumContact -
Date:17FridayMarch 2017Lecture
Life Sciences Open Day
More information Time 09:30 - 14:00Location The David Lopatie Conference CentreOrganizer Weizmann School of ScienceHomepage Contact -
Date:17FridayMarch 2017Cultural Events
Miki Geva - Stand up
More information Time 22:00 - 22:00Location Michael Sela AuditoriumContact -
Date:18SaturdayMarch 2017Cultural Events
Dr. Zahy Ben Zion - Stand Up
More information Time 21:30 - 21:30Title Food.Drink.Man.Woman.Location Michael Sela AuditoriumContact -
Date:19SundayMarch 2017Lecture
Hidden worlds of marine microbes: complex networks of interactions
More information Time 11:00 - 11:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Prof. Virginia (Ginger) Armbrust
Center for Environmental Genomics, School of Oceanography, University of Washington, Seattle, USAOrganizer Department of Plant and Environmental SciencesContact Abstract Show full text abstract about Website: http://armbrustlab.ocean.washington.edu/ ...» Website: http://armbrustlab.ocean.washington.edu/ -
Date:19SundayMarch 2017Lecture
The Circumglobal North American wave pattern and its relation to North American cold events
More information Time 11:00 - 11:00Location Sussman Family Building for Environmental SciencesLecturer Nili Harnik
Department of Geosciences Tel Aviv UniversityOrganizer Department of Earth and Planetary SciencesContact Abstract Show full text abstract about The polar vortex has "made headlines" in recent ye...» The polar vortex has "made headlines" in recent years, following anomalously cold Eastern US winters alongside continuing drought conditions in California which were associated with strong undulations in the tropospheric jet stream which bring cold polar air southward over the Eastern part of the continent, and warm dry conditions over the south west. Recent studies have associated these undulations with anomalous tropical Pacific SST anomalies. We propose that these jet undulations are associated with the North American part of the Circumglobal Teleconnection Pattern - a pair of zonally oriented waves of zonal wavenumber 5 which are in zonal quadrature with each other. While the PNA is associated with the first circumglobal wave pattern, Eastern North American extreme cold events are associated with the second pattern. The implications of this association regarding the physical drivers of such cold events will be discussed, in particular Asian wavepacket precursors and the possible relation to SST anomalies. -
Date:19SundayMarch 2017Lecture
Molecular determinants of a lipid droplet subpopulation at the nucleus vacuole junction
More information Time 13:00 - 13:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Dr. Maria Bohnert
Maya Schuldiner's group, Dept. of Molecular Genetics, WISOrganizer Department of Molecular GeneticsContact -
Date:19SundayMarch 2017Lecture
Electrons extraction from photosynthetic systems for hydrogen fuel production in Bio-Photo-Electrochemical Cells
More information Time 13:00 - 13:00Title AERI-Alternative Sustainable Energy Research Initiative Seminar SeriesLocation Gerhard M.J. Schmidt Lecture HallLecturer Dan Kallmann
PhD candidate at the Grand Technion Energy Program , Technion-Israel Institute of Technology, HaifaOrganizer Weizmann School of ScienceContact -
Date:19SundayMarch 2017Lecture
LINCing noncoding transcription to control of hepatic nutrient partitioning
More information Time 15:00 - 16:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Dr. Jan-Wilhelm Kornfeld
Max-Planck-Institute for Metabolism Research. Cologne, GermanyContact -
Date:19SundayMarch 2017Cultural Events
English Musical - Annie
More information Time 18:30 - 18:30Location Michael Sela AuditoriumContact -
Date:20MondayMarch 2017Colloquia
Life Sciences Colloquium
More information Time 11:00 - 12:00Title TBDLocation Dolfi and Lola Ebner AuditoriumLecturer Prof. Christine Jacobs- Wagner
Department of Molecular, Cellular and Developmental Biology, Yale University, Microbial Pathogenesis Dept, Yale School of Medicine, Howard Hughes Medical InstituteContact -
Date:20MondayMarch 2017Lecture
Recent advances in understanding the cellular roles of GSK-3 and its potential therapeutic implications
More information Time 14:00 - 15:00Location Max and Lillian Candiotty BuildingLecturer Prof. Hagit Eldar-Finkelman
Professor of Human Molecular Genetics & Biochemistry, Sackler School of Medicine, Tel Aviv UniversityOrganizer Department of Immunology and Regenerative BiologyContact -
Date:20MondayMarch 2017Cultural Events
Afternoon Music - Asaf Ayalon host Alma Zohar
More information Time 16:30 - 16:30Location Michael Sela AuditoriumContact -
Date:21TuesdayMarch 2017Lecture
The shifting structure of the clathrin coat as revealed by correlative light and electron tomography
More information Time 10:00 - 11:00Location Wolfson Building for Biological ResearchLecturer Prof. Ori Avinoam
Dept. of Biomolecular Sciences-WISOrganizer Department of Biomolecular SciencesContact Abstract Show full text abstract about Clathrin mediated endocytosis (CME) is a basic cellular func...» Clathrin mediated endocytosis (CME) is a basic cellular function playing essential roles in nutrient uptake, membrane recycling, synaptic transmission and viral infection. At the level of individual core components, CME might be considered well understood because we have an abundance of structural, biochemical, biophysical and dynamic information. However, researchers remain divided between two contradictory models for how clathrin coated vesicles (CCVs) form. The first, suggests that clathrin assembles as a planar lattice that subsequently bends as the membrane invaginates. For this to happen, complex rearrangements within the clathrin network must occur during budding. The second model avoids this difficulty by proposing that large flat clathrin lattices are not precursors of CME, and that at sites of CME, clathrin directly assembles to produce the curved coat as the membrane invaginates. To distinguish between these models, we applied a high precision correlative fluorescence microscopy (FM) and electron tomography (ET) approach to locate CCPs and obtain 3D information about their ultrastructure. We found that clathrin is recruited to the membrane early in endocytosis, before any significant membrane bending has occurred, and then rearranges as the membrane bends to wrap around the forming vesicle. Furthermore, we showed by FM that clathrin undergoes rapid exchange with the cytoplasmic pool at sites of endocytosis, providing insights into the mechanism driving coat rearrangement. To obtain structural information on the organization of the clathrin lattice at different stages of maturation, we performed correlated cryo -FM and -ET (Cryo-CLEM) on intact, genome edited mammalian cells expressing clathrin-GFP. We targeted sites of endocytosis using the fluorescence and resolved the positions of individual clathrin molecules within the assembled lattice. Our preliminary data suggests that lattice geometry changes during maturation from a flat sheet to a curved sphere. This fundamental knowledge in necessary to achieve a holistic understanding of this basic cellular function.
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Date:21TuesdayMarch 2017Lecture
Evaluating the Role of Water Availability in Determining the Yield/Plant Population Density Relationship
More information Time 11:15 - 11:15Location Ullmann Building of Life SciencesLecturer Dr. Shmulik Friedman
Department of Environmental Physics and Irrigation, Institute of Soil, Water and Environmental Sciences, Agriculture Research Organization (ARO) Volcani Research Center, Bet DaganOrganizer Department of Plant and Environmental SciencesContact Abstract Show full text abstract about Thirty-eight yield/plant-population-density (Y-PPD) data set...» Thirty-eight yield/plant-population-density (Y-PPD) data sets were collected from the literature and analyzed statistically to yield, inter alia, a single "universal" relationship that realistically describes the Y-PPD data obtained with various plants in various agricultural and environmental conditions. The present study aims to facilitate evaluation of the dependence of water availability to plant-root systems on plant-population density, plant-arrangement geometry, active-root-system size, and soil texture. The outlined evaluation of the relative water uptake rate/plant-population-density (RWUR-PPD) relationship can quantify the roles of water availability and competition among neighboring root systems in determining the Y-PPD relationship. In particular, this methodology quantifies the effects of root system size, soil capillary length and planting rectangularity, on the Y-PPD relationship. Overall, the proposed RWUR evaluation shows, in reasonable qualitative agreement with experimental findings, that the Y-PPD relationship increases with increasing root system radius and soil capillary length, and with decreasing rectangularity. RWUR evaluation shows that interplant competition for water increases approximately linearly with the product of (root-system radius) × (soil capillary length). The water-competition factor is approximately equal to 4 r01-1, i.e. to the surface area of a sphere with a radius equal to the geometric mean of the radius of root system (r0) and the soil capillary length (-1). Plant roots and shoots compete also for resources other than water, e.g., soil nutrients and oxygen and solar radiation. Thus, the agronomically important Y-PPD relationship depends on genetic, agricultural, and environmental factors that affect availability of other resources differently from their effects on water availability; and these differences render it virtually impossible to define and quantify the roles of the various essential resources and the effects of diverse factors in determining the Y-PPD relationship. This is why practical agronomists use empirical mathematical expressions to describe Y-PPD. -
Date:21TuesdayMarch 2017Lecture
Dr. Noam Stern-Ginossar - Viruses: Friend or Foe?
More information Time 12:00 - 12:00Title Viruses: Friend or Foe?Location Dolfi and Lola Ebner AuditoriumLecturer Prof. Noam Stern-Ginossar Organizer Communications and Spokesperson DepartmentHomepage Contact