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פברואר 18, 2016
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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 -
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 -
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 -
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 -
Date:21שלישימרץ 2017הרצאה
MCB - Students seminar
More information שעה 12:15 - 12:15כותרת TBAמיקום בניין וולפסון למחקר ביולוגימארגן המחלקה לביולוגיה מולקולרית של התאצרו קשר -
Date:21שלישימרץ 2017הרצאה
Chemical love – The molecular neuroetholgy of pheromonal communication
More information שעה 12:30 - 12:30מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Yehuda Ben-Shahar
Washington University School of Medicine Washington Universityמארגן המחלקה למדעי המוחצרו קשר תקציר 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:21שלישימרץ 2017הרצאה
AMO Special Seminar
More information שעה 13:15 - 14:15כותרת The delay-time distribution in scattering of ultra-short light pulses from complex targetsמיקום בניין הפיזיקה ע"ש עדנה וק.ב. וייסמןמרצה Prof. Uzy Smilansky
Physics of Complex Systems, Weizmannמארגן המחלקה לפיזיקה של מערכות מורכבותצרו קשר תקציר 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:21שלישימרץ 2017הרצאה
Chemical Physics Department Guest Seminar
More information שעה 15:00 - 15:00כותרת Neural Control of Abundant Systems as Local Algorithms Stabilizing Subspacesמיקום בניין פרלמן למדעי הכימיהמרצה Prof Vladimir Akulin
Laboratoire Aime Cotton CNRS, Franceמארגן המחלקה לפיזיקה כימית וביולוגיתצרו קשר תקציר 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:21שלישימרץ 2017אירועי תרבות
פיטר פן - הצגת ילדים
More information שעה 17:30 - 17:30מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:22רביעימרץ 2017הרצאה
"Glass Ceiling and Power Inequality in Social Network"
More information שעה 11:00 - 11:00מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. David Peleg
Dean, Mathematics and Computer Science facultyמארגן המחלקה לפיזיקה כימית וביולוגיתצרו קשר -
Date:23חמישימרץ 2017סימפוזיונים
Properties of Elementary Particles Fluxes and their Ratios in Cosmic Rays
More information שעה 11:15 - 12:30מיקום בניין הפיזיקה ע"ש עדנה וק.ב. וייסמןמרצה Andrei Kounine
Cernמארגן הפקולטה לפיזיקהצרו קשר תקציר 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:23חמישימרץ 2017הרצאה
Local motion signals: statistics, responses and generative models
More information שעה 14:30 - 14:30מיקום בניין לחקר המוח על-שם נלה וליאון בנוזיומרצה Dr. Eyal Nitzany
Dept of Physics and Astronomy, Northwestern University and Dept of Organismal Biology and Anatomy, University of Chicagoמארגן המחלקה למדעי המוחצרו קשר תקציר 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:23חמישימרץ 2017הרצאה
Pelletron meeting - by invitation only
More information שעה 16:00 - 17:45צרו קשר -
Date:25שבתמרץ 2017אירועי תרבות
בן בן ברוך - סטנד אפ
More information שעה 21:00 - 21:00מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:26ראשוןמרץ 2017הרצאה
Lissencephaly and Rett syndrome; two disorders, one story
More information שעה 13:00 - 13:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Liraz Keidar
Orly Reiner's group, Dept. of Molecular Genetics, WISמארגן המחלקה לגנטיקה מולקולריתצרו קשר -
Date:27שנימרץ 2017סימפוזיונים
"The dramatic development of X-ray photocrystallography over the past six decades"
More information שעה 11:00 - 12:15מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Philip Coppens
Department of Chemistry, The State University of New Yorkמארגן הפקולטה לכימיהצרו קשר -
Date:28שלישימרץ 201731שישימרץ 2017כנסים
Study of high density nuclear matter with hadron beams
More information שעה 08:00 - 08:00מיקום מרכז כנסים על-שם דויד לופאטייושב ראש Itzhak Tserruya -
Date:28שלישימרץ 2017הרצאה
Departmental Seminar
More information שעה 11:00 - 11:00מיקום בניין הלן ומילטון קימלמןמרצה Prof. Andreas Pfaltz, Basel University מארגן המחלקה לכימיה מולקולרית ולמדע חומריםצרו קשר -
Date:28שלישימרץ 2017הרצאה
The biomass distribution on Earth
More information שעה 11:15 - 11:15מיקום בניין אולמן למדעי החייםמרצה Yinon Moise Bar-On
Prof. Ron Milo’s lab, Dept. of Plant and Environmental Sciencesמארגן המחלקה למדעי הצמח והסביבהצרו קשר -
Date:28שלישימרץ 2017הרצאה
Could life-long memory be encoded in the pattern of holes in the Perineuronal net?
More information שעה 12:30 - 12:30מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Dr. Varda Lev-Ram
Dept. of Pharmacology, School of Medicine, UCSD, La Jolla, CAמארגן המחלקה למדעי המוחצרו קשר תקציר 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.