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פברואר 18, 2016
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Date:15רביעימרץ 2017הרצאה
Chemical Physics Department Guest Seminar
More information שעה 10:00 - 10:00כותרת Thermalization, Dynamics and Many-Body Localizationמיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Dr Yevgeny Bar Lev
Columbia Universityמארגן המחלקה לפיזיקה כימית וביולוגיתצרו קשר תקציר 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:15רביעימרץ 2017הרצאה
Nucleation, Growth, and Morphology of Molecularly Thin Organic Films at Planar Solid/Vapor Interfaces Prepared from Solute/Solvent Mixtures
More information שעה 14:00 - 15:00מיקום בניין פרלמן למדעי הכימיהמרצה Dr. Hans Riegler
Max Planck Institute of Colloids and Interfaces, Potsdam-Golmמארגן המחלקה לכימיה מולקולרית ולמדע חומריםצרו קשר -
Date:16חמישימרץ 2017סימפוזיונים
Topological Photonics and Topological Insulator Lasers
More information שעה 11:15 - 12:30מיקום בניין הפיזיקה ע"ש עדנה וק.ב. וייסמןמרצה Moti Segev
Technionמארגן הפקולטה לפיזיקהצרו קשר תקציר Show full text abstract about TBA ...» TBA -
Date:16חמישימרץ 2017הרצאה
Spatiotemporal patterning in motor cortex during movement initiation
More information שעה 12:30 - 12:30מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Nicholas Hatsopoulos
University of Chicago Dept of Organismal Biology and Anatomy Chair, Committee on Computational Neuroscience Committee on Neurobiologyמארגן המחלקה למדעי המוחצרו קשר תקציר 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:16חמישימרץ 2017אירועי תרבות
יובל המבולבל - פינוקיו
More information שעה 17:30 - 17:30מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:17שישימרץ 2017הרצאה
יום פתוח במדעי החיים
More information שעה 09:30 - 14:00מיקום מרכז כנסים על-שם דויד לופאטימארגן בית הספר למחקר - מכון ויצמן למדעדף בית צרו קשר -
Date:17שישימרץ 2017אירועי תרבות
מיקי גבע - סטנד אפ
More information שעה 22:00 - 22:00מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:18שבתמרץ 2017אירועי תרבות
דר' צחי בן ציון - סטנד אפ
More information שעה 21:30 - 21:30כותרת אוכל.שתיה.גבר.אשהמיקום אודיטוריום מיכאל סלעצרו קשר -
Date:19ראשוןמרץ 2017הרצאה
Hidden worlds of marine microbes: complex networks of interactions
More information שעה 11:00 - 11:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Prof. Virginia (Ginger) Armbrust
Center for Environmental Genomics, School of Oceanography, University of Washington, Seattle, USAמארגן המחלקה למדעי הצמח והסביבהצרו קשר תקציר Show full text abstract about Website: http://armbrustlab.ocean.washington.edu/ ...» Website: http://armbrustlab.ocean.washington.edu/ -
Date:19ראשוןמרץ 2017הרצאה
The Circumglobal North American wave pattern and its relation to North American cold events
More information שעה 11:00 - 11:00מיקום בניין משפחת זוסמןמרצה Nili Harnik
Department of Geosciences Tel Aviv Universityמארגן המחלקה למדעי כדור הארץ וכוכבי הלכתצרו קשר תקציר 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:19ראשוןמרץ 2017הרצאה
Molecular determinants of a lipid droplet subpopulation at the nucleus vacuole junction
More information שעה 13:00 - 13:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Dr. Maria Bohnert
Maya Schuldiner's group, Dept. of Molecular Genetics, WISמארגן המחלקה לגנטיקה מולקולריתצרו קשר -
Date:19ראשוןמרץ 2017הרצאה
Electrons extraction from photosynthetic systems for hydrogen fuel production in Bio-Photo-Electrochemical Cells
More information שעה 13:00 - 13:00כותרת AERI-Alternative Sustainable Energy Research Initiative Seminar Seriesמיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Dan Kallmann
PhD candidate at the Grand Technion Energy Program , Technion-Israel Institute of Technology, Haifaמארגן בית הספר למחקר - מכון ויצמן למדעצרו קשר -
Date:19ראשוןמרץ 2017הרצאה
LINCing noncoding transcription to control of hepatic nutrient partitioning
More information שעה 15:00 - 16:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Dr. Jan-Wilhelm Kornfeld
Max-Planck-Institute for Metabolism Research. Cologne, Germanyצרו קשר -
Date:19ראשוןמרץ 2017אירועי תרבות
מחזמר באנגלית - אנני
More information שעה 18:30 - 18:30מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:20שנימרץ 2017סימפוזיונים
Life Sciences Colloquium
More information שעה 11:00 - 12:00כותרת TBDמיקום אולם ע"ש דולפי ולולה אבנרמרצה Prof. Christine Jacobs- Wagner
Department of Molecular, Cellular and Developmental Biology, Yale University, Microbial Pathogenesis Dept, Yale School of Medicine, Howard Hughes Medical Instituteצרו קשר -
Date:20שנימרץ 2017הרצאה
Recent advances in understanding the cellular roles of GSK-3 and its potential therapeutic implications
More information שעה 14:00 - 15:00מיקום בניין ע"ש מקס ולילאן קנדיוטימרצה Prof. Hagit Eldar-Finkelman
Professor of Human Molecular Genetics & Biochemistry, Sackler School of Medicine, Tel Aviv Universityמארגן המחלקה לאימונולוגיה ורגנרציה ביולוגיתצרו קשר -
Date:20שנימרץ 2017אירועי תרבות
מנחה מוזיקלית - אסף איילון מארח את עלמה זוהר
More information שעה 16:30 - 16:30מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:21שלישימרץ 2017הרצאה
The shifting structure of the clathrin coat as revealed by correlative light and electron tomography
More information שעה 10:00 - 11:00מיקום בניין וולפסון למחקר ביולוגימרצה Prof. Ori Avinoam
Dept. of Biomolecular Sciences-WISמארגן המחלקה למדעים ביומולקולרייםצרו קשר תקציר 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:21שלישימרץ 2017הרצאה
Evaluating the Role of Water Availability in Determining the Yield/Plant Population Density Relationship
More information שעה 11:15 - 11:15מיקום בניין אולמן למדעי החייםמרצה Dr. Shmulik Friedman
Department of Environmental Physics and Irrigation, Institute of Soil, Water and Environmental Sciences, Agriculture Research Organization (ARO) Volcani Research Center, Bet Daganמארגן המחלקה למדעי הצמח והסביבהצרו קשר תקציר 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:21שלישימרץ 2017הרצאה
ד"ר נעם גינוסר - וירוסים: חברים או אויבים?
More information שעה 12:00 - 12:00כותרת וירוסים: חברים או אויבים?מיקום אולם ע"ש דולפי ולולה אבנרמרצה Prof. Noam Stern-Ginossar מארגן המחלקה לתקשורת ודוברותדף בית צרו קשר