Pages
February 18, 2016
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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 -
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 -
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 -
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 -
Date:21TuesdayMarch 2017Lecture
MCB - Students seminar
More information Time 12:15 - 12:15Title TBALocation Wolfson Building for Biological ResearchOrganizer Department of Molecular Cell BiologyContact -
Date:21TuesdayMarch 2017Lecture
Chemical love – The molecular neuroetholgy of pheromonal communication
More information Time 12:30 - 12:30Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. Yehuda Ben-Shahar
Washington University School of Medicine Washington UniversityOrganizer Department of Brain SciencesContact Abstract Show full text abstract about Research in the Ben-Shahar lab at Washington University in S...» Research in the Ben-Shahar lab at Washington University in St. Louis is focused on several integrative projects at the interface of evolution, genetics, and neuroethology. Specifically, research in the lab follows two major themes: 1) The genetic and neuronal processes that regulate the interactions between individual animals and their social environment, including the evolution and signaling mechanisms associated with pheromonal communication in insects, and the neuronal circuits that drive pheromone-induced behaviors; 2) the molecular evolution and genetics of the neuronal stress response, with a specific focus on mechanistic tradeoffs between neuronal robustness and cognition. -
Date:21TuesdayMarch 2017Lecture
AMO Special Seminar
More information Time 13:15 - 14:15Title The delay-time distribution in scattering of ultra-short light pulses from complex targetsLocation Edna and K.B. Weissman Building of Physical SciencesLecturer Prof. Uzy Smilansky
Physics of Complex Systems, WeizmannOrganizer Department of Physics of Complex SystemsContact Abstract Show full text abstract about When time-narrow wave-packets scatter by complex target, th...» When time-narrow wave-packets scatter by complex target, the field is trapped for some time, and emerges as a time broadened pulse, whose shape reflects the distribution of the delay (trapping) -times. I shall present a comprehensive framework for the computation of the delay-time distribution, and its dependence on the scattering dynamics, the wave-packet envelope (profile) and the dispersion relation. I shall then show how the well-known Wigner-Smith mean delay time and the semi-classical approximation emerge as limiting cases, valid only under special circumstances. For scattering on random media, localization has a drastic effect on the delay-time distribution. I shall demonstrate it for a particular one-dimensional system which can be analytically solved. -
Date:21TuesdayMarch 2017Lecture
Chemical Physics Department Guest Seminar
More information Time 15:00 - 15:00Title Neural Control of Abundant Systems as Local Algorithms Stabilizing SubspacesLocation Perlman Chemical Sciences BuildingLecturer Prof Vladimir Akulin
Laboratoire Aime Cotton CNRS, FranceOrganizer Department of Chemical and Biological PhysicsContact Abstract Show full text abstract about We address the problem of stability of motor actions impleme...» We address the problem of stability of motor actions implemented by the central nervous system based on simple algorithms potentially reflecting physical (including physiological) processes within the body. A number of conceptually simple algorithms that solve motor tasks with a high probability of success may be based on feedback schemes that ensure stability of subspaces of neural variables associated with accomplishing those tasks. The task is formulated in terms of linear constrains imposed either on the human body mechanical variables or on neural variables; we discuss three reference frames relevant to these processes. We discuss underlying basic principles of such algorithms, their architecture, and efficiency, and compare the outcomes of implementation of such algorithms with the results of experiments performed on the human hand. -
Date:21TuesdayMarch 2017Cultural Events
Peter Pan - Children's theater
More information Time 17:30 - 17:30Location Michael Sela AuditoriumContact -
Date:22WednesdayMarch 2017Lecture
"Glass Ceiling and Power Inequality in Social Network"
More information Time 11:00 - 11:00Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. David Peleg
Dean, Mathematics and Computer Science facultyOrganizer Department of Chemical and Biological PhysicsContact -
Date:23ThursdayMarch 2017Colloquia
Properties of Elementary Particles Fluxes and their Ratios in Cosmic Rays
More information Time 11:15 - 12:30Location Edna and K.B. Weissman Building of Physical SciencesLecturer Andrei Kounine
CernOrganizer Faculty of PhysicsContact Abstract Show full text abstract about The Alpha Magnetic Spectrometer is a state-of-art particle p...» The Alpha Magnetic Spectrometer is a state-of-art particle physics detector
collecting data on the International Space Station since May 2011. Precision
measurements of all elementary charged cosmic ray particles have been
performed by AMS using a data sample of 85 billion events collected during the
first five years of operations on the Station. The latest AMS results on the fluxes
and flux ratios of the elementary cosmic ray particles show unique features that
require accurate theoretical interpretation of their origin, be it from dark matter
collisions or new astrophysical sources.
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Date:23ThursdayMarch 2017Lecture
Local motion signals: statistics, responses and generative models
More information Time 14:30 - 14:30Location Nella and Leon Benoziyo Building for Brain ResearchLecturer Dr. Eyal Nitzany
Dept of Physics and Astronomy, Northwestern University and Dept of Organismal Biology and Anatomy, University of ChicagoOrganizer Department of Brain SciencesContact Abstract Show full text abstract about Many visual tasks, such as separation of figures from ground...» Many visual tasks, such as separation of figures from ground and navigation, benefit from the extraction and the usage of local motion signals. Yet, there are many ways in which local motion signals are being represented (mostly based on mathematical and computational considerations). I’ll begin this talk by presenting a computational work that explored whether specific kinds of local motion signals occur in the natural world (Nitzany&Victor, 2014, Journal of Vision).
Next, I will present the results of a neurophysiological experiment where we recorded from the main visual brain areas of two visually accomplished, but very different, animals—macaque monkeys and dragonflies. We found similar responses to local motion signals across species, which may serve as neurophysiologic evidence that mammalian visual cortex and the visual centers of the dragonfly brain process motion using similar algorithms and may have converged on a common computational scheme for detecting visual motion.
Finally, I’ll present our current work, which extends and manipulates a few machine learning techniques to generate novel stimuli, where specific characteristics, with regards to local motion signals, are being preserved.
If time permits, I will discuss another line of work (Menda et. al., 2014, Current Biology, Shamble et. al., 2016, Current Biology), where we were able to record from neurons of jumping spiders. I will explain our approach that enables us to record from those tiny marvelous creatures and review our main findings with regards to visual and auditory cues.
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Date:23ThursdayMarch 2017Lecture
Pelletron meeting - by invitation only
More information Time 16:00 - 17:45Contact -
Date:25SaturdayMarch 2017Cultural Events
Ben Ben Baruch - Stand up
More information Time 21:00 - 21:00Location Michael Sela AuditoriumContact -
Date:26SundayMarch 2017Lecture
Lissencephaly and Rett syndrome; two disorders, one story
More information Time 13:00 - 13:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Liraz Keidar
Orly Reiner's group, Dept. of Molecular Genetics, WISOrganizer Department of Molecular GeneticsContact -
Date:27MondayMarch 2017Colloquia
"The dramatic development of X-ray photocrystallography over the past six decades"
More information Time 11:00 - 12:15Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. Philip Coppens
Department of Chemistry, The State University of New YorkOrganizer Faculty of ChemistryContact -
Date:28TuesdayMarch 201731FridayMarch 2017Conference
Study of high density nuclear matter with hadron beams
More information Time 08:00 - 08:00Location The David Lopatie Conference CentreChairperson Itzhak Tserruya -
Date:28TuesdayMarch 2017Lecture
Departmental Seminar
More information Time 11:00 - 11:00Location Helen and Milton A. Kimmelman BuildingLecturer Prof. Andreas Pfaltz, Basel University Organizer Department of Molecular Chemistry and Materials ScienceContact -
Date:28TuesdayMarch 2017Lecture
The biomass distribution on Earth
More information Time 11:15 - 11:15Location Ullmann Building of Life SciencesLecturer Yinon Moise Bar-On
Prof. Ron Milo’s lab, Dept. of Plant and Environmental SciencesOrganizer Department of Plant and Environmental SciencesContact -
Date:28TuesdayMarch 2017Lecture
Could life-long memory be encoded in the pattern of holes in the Perineuronal net?
More information Time 12:30 - 12:30Location Gerhard M.J. Schmidt Lecture HallLecturer Dr. Varda Lev-Ram
Dept. of Pharmacology, School of Medicine, UCSD, La Jolla, CAOrganizer Department of Brain SciencesContact Abstract Show full text abstract about Abstract: The PNN is a specialized form of extracellular mat...» Abstract: The PNN is a specialized form of extracellular matrix, initially deposited around selected neurons during critical periods of development in specific parts of the brain, interrupted by holes where synapses occur. We postulate that the PNN comprises a longer-lived structural template and that new memories are created by cutting new holes in the PNN or by expanding existing holes to enable formation of new synapses or to strengthen existing ones. A basic premise of this hypothesis is that the PNN, should undergo very low metabolic renewal from the first age at which memories are retained until senescence, whereas the active constituents of synapses turn over much more frequently and would therefore be poorer substrates for permanent information storage, unless they are equipped with incredibly accurate copying mechanisms (R.Y.Tsien PNAS 2013). Experimental tests of the hypothesis:
1.PNN longevity; using 15N Spirulina diet for Stable Isotope Labeling in Mammals (SILAM) we compare the lifetimes of PNN proteins vs. synaptic components in Enriched Environment (EE) vs. Conventional Cages (CC), ending the pulse-chase by changing to 14N diet at P45. Analysis by Multidimensional Protein Identification Technology (MudPIT) of four different brain areas indicate:
a. Low turnover rate for PNN proteins while synaptic proteins were at the noise level of 15N /14N ratio.
b. Higher turnover of PNN proteins in EE vs. CC cages
c.Variability in the retention of 15N in PNN proteins between brain areas.
2.Localization of the long-lasting proteins; Imaging of 15N /14N ratio using Nanoscale secondary ion mass spectrometry (nanoSIMS) localized and verified the MudPit finding that PNN turnover is very slow.
3. Spatial occupation of the PNN holes; 2 dimension electron microscopy (EM) and 3D volumes of Serial Block Face Scanning EM reveal that neurons engulfed in PNN have more than 95% of their plasma membrane surface occupied by PNN or synapses.
4. Inhibition of PNN holes modulation during strong memories acquisition; we examined the role and timing of matrix metalloproteinases (MMP) activity in memory consolidation using pharmacological inhibitors in a fear-conditioning paradigm. Our results demonstrate that MMP inhibition during fear induction:
a. Does not affect acquisition
b. Significantly impairs long-term memory (30 days)
c. Is dose dependent
d. That memory impairment increases with time.
So far the hypothesis is supported by the results of the above tests.