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April 28, 2015
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Date:03SundayMay 2015Lecture
Saturn > Jupiter: Why Saturn has polar cyclones and why Jupiter may not.
More information Time 11:00 - 11:00Location Sussman Family Building for Environmental SciencesLecturer Morgan O'Neill
Department of Earth and Planetary Sciences Weizmann Institute of ScienceOrganizer Department of Earth and Planetary SciencesContact Abstract Show full text abstract about The poles of Saturn, Uranus and Neptune each have a 'ho...» The poles of Saturn, Uranus and Neptune each have a 'hot spot' that is observable from Earth. Saturn, which has been observed in great detail by the orbiting Cassini mission, exhibits Earth-sized hurricane-like cyclones on each pole. These massive cyclones have been present since they were first observed in 2004 and may be permanent. Our study proposes a mechanism for their creation: numerous small, moist convective thunderstorms. These thunderstorms are ubiquitous small scale features on Jupiter and Saturn. Hundreds of simulations suggest that these very small, short-lived storms can build and maintain a deep, rapid, large polar cyclone like we see on Saturn. Furthermore, an exploration of cyclone sensitivity to the deformation radius and total energy input suggests that Uranus and Neptune have transient polar cyclones, and Jupiter will not exhibit them. This last prediction will be tested for the first time next year, when the NASA Juno mission reaches Jupiter and finally observes the Jovian poles.
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Date:03SundayMay 2015Lecture
Chemical Physics Lunch Club Seminar
More information Time 12:30 - 12:30Title Molecular Collisions coming into FocusLocation Gerhard M.J. Schmidt Lecture HallLecturer Sebastiaan Y.T. van de Meerakker
Radboud University, Nijmegen, NetherlandsOrganizer Department of Chemical and Biological PhysicsContact Abstract Show full text abstract about The study of molecular collisions with the highest possible ...» The study of molecular collisions with the highest possible detail has been an important research theme in physical chemistry for decades. Over the last years we have developed methods to get improved control over molecules in a molecular beam [1]. With the Stark decelerator, a part of a molecular beam can be selected to produce bunches of molecules with a computer-controlled velocity and with longitudinal temperatures as low as a few mK. The molecular packets that emerge from the decelerator have small spatial and angular spreads, and have almost perfect quantum state purity. These tamed molecular beams allow for crossed beam scattering experiments with unprecedented levels of precision and sensitivity [2,3].
I will discuss our most recent results on the combination of Stark deceleration and velocity map imaging. The narrow velocity spread of Stark-decelerated beams results in scattering images with an unprecedented sharpness and angular resolution. This has facilitated the observation of diffraction oscillations in the state-to-state differential cross sections for collisions of NO with rare gas atoms [4]. Observed features in the diffraction pattern result from subtle quantum interference effects, and appear extremely sensitive to the potential energy surfaces governing the scattering process [5].
[1] S.Y.T. van de Meerakker, H.L. Bethlem, G. Meijer, Nature Physics 4, 595 (2008).
[2] J.J. Gilijamse, S. Hoekstra, S.Y.T. van de Meerakker, G.C. Groenenboom, G. Meijer,
Science 313, 1617 (2006).
[3] M. Kirste, X. Wang, H.C. Schewe, G. Meijer, K. Liu, A. van der Avoird, L.M.C.
Janssen, K.B. Gubbels, G.C. Groenenboom, S.Y.T. van de Meerakker,
Science 338, 1060 (2012).
[4] A. von Zastrow, J. Onvlee, S.N. Vogels, G.C. Groenenboom, A. van der Avoird,
S.Y.T. van de Meerakker, Nature Chemistry 6, 216 (2014).
[5] S.N. Vogels, J. Onvlee, A. von Zastrow, G.C. Groenenboom, A. van der Avoird,
S.Y.T. van de Meerakker, Phys. Rev. Lett. 113, 263202 (2014).
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Date:03SundayMay 2015Lecture
The road to recovery: the function of Runx1 in muscle regeneration
More information Time 13:00 - 13:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Kfir Umansky
Yoram Groner's group, Dept. of Molecular Genetics, WISContact -
Date:03SundayMay 2015Lecture
Understanding and Controlling 3D Assembly at the Nanoscale: Directed Assembly of Block Copolymers
More information Time 14:00 - 14:00Location Perlman Chemical Sciences BuildingLecturer Dr. Tamar Segal-Peretz
Institute for Molecular Engineering, University of ChicagoOrganizer Department of Molecular Chemistry and Materials ScienceContact -
Date:03SundayMay 2015Lecture
Optogenetic fMRI to probe dopaminergic circuits
More information Time 14:00 - 17:00Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. Gary Glover
Stanford UniversityOrganizer Department of Brain SciencesContact -
Date:03SundayMay 2015Lecture
Towards mapping the Human Brain: imaging function and connectivity from cortical columns to whole brain
More information Time 14:00 - 17:00Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. Kamil Ugurbil
University of MinnesotaOrganizer Department of Brain SciencesContact -
Date:03SundayMay 2015Lecture
Cracking Mesoscopic Coding Principles in the Human Brain with Ultra-High Field Functional Magnetic Resonance Imaging
More information Time 14:00 - 17:00Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. Dr. Rainer Goebel
Maastricht UniversityOrganizer Department of Brain SciencesContact -
Date:04MondayMay 2015Lecture
Thiophene Rust in Organic Electronics
More information Time 11:00 - 12:00Location Helen and Milton A. Kimmelman BuildingLecturer Prof. Luis Campos
From Columbia University, New York, USAOrganizer Department of Molecular Chemistry and Materials ScienceContact -
Date:04MondayMay 2015Lecture
Student Seminar
More information Time 12:15 - 12:15Title Nitric oxide controls a switch between degenerative and regenerative phases of developmental neuronal remodeling & The role of mutant p53 in the tumorigenesis of mesenchymal stem cellsLocation Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Dr. Gabriela Koifman Organizer Department of Molecular Cell BiologyContact -
Date:04MondayMay 2015Lecture
Cancer Meets Epitranscriptomics
More information Time 14:00 - 14:00Location Max and Lillian Candiotty BuildingLecturer PROF. GIDI RECHAVI
SHEBA MEDICAL CENTER TEL HASHOMEROrganizer Department of Immunology and Regenerative BiologyContact Abstract Show full text abstract about In the last decade advances in Next Generation Sequencing an...» In the last decade advances in Next Generation Sequencing and bioinformatics enabled the unraveling of global RNA modifications and editing. The evolving field of epitranscriptomics proved to be important in cell fate decisions, normal development and disease.
The lecture will deal with A to I editing-based mechanisms relevant to cancer and with the emerging role
of m6A methylation in the precise regulation of early embryonic development. -
Date:04MondayMay 2015Lecture
The principles of kinetic theory for granular
More information Time 14:15 - 14:15Location Edna and K.B. Weissman Building of Physical SciencesLecturer Massimo Tessarotto - University of Trieste Organizer Department of Physics of Complex SystemsContact -
Date:04MondayMay 2015Lecture
Search for Time-Reversal-Violation in atom traps"
More information Time 14:45 - 15:00Location Tel Aviv UniversityLecturer Danny Ashery
Tel-Aviv UniversityOrganizer Department of Particle Physics and AstrophysicsContact Abstract Show full text abstract about Several ways to search for time-reversal-violation in beta d...» Several ways to search for time-reversal-violation in beta decay of trapped nuclei will be reviewed. The newly upgraded TRINAT trap system will be described showing the high sensitivity required for such a search. The experimental plans for such experiments will be described. -
Date:04MondayMay 2015Lecture
The Curious Case of Tantalum 180
More information Time 16:15 - 17:15Location Tel Aviv UniversityLecturer Naftali Auerbach
Tel Aviv UniversityOrganizer Department of Particle Physics and AstrophysicsContact Abstract Show full text abstract about The Ta 180m nucleus is the rarest naturally occurring isotop...» The Ta 180m nucleus is the rarest naturally occurring isotope. It exists in an isomeric state with half-life time of 1.2 10**15 years, at an excitation energy of 77 keV and spin J=9. We study the possibility that when irradiated by gamma rays or subjected to Coulomb excitation its decay can be accelerated by the existence of a doorway. We describe the mechanism of such a decay similar to the chaos-assisted tunneling. -
Date:05TuesdayMay 2015Lecture
DELLA, SPY and hormone signaling in tomato and Arabidopsis
More information Time 11:15 - 11:15Location Ullmann Building of Life SciencesLecturer Prof. David Weiss
Institute of Plant Sciences and Genetics, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of JerusalemOrganizer Department of Plant and Environmental SciencesContact -
Date:05TuesdayMay 2015Lecture
The interaction of synaptic plasticity and scaling and their role in memory dynamics
More information Time 12:30 - 12:30Location Gerhard M.J. Schmidt Lecture HallLecturer Dr. Christian Tetzlaff
Bernstein Center for Computational Neuroscience, Max-Planck Institute for Dynamics and Self-Organization, GottingenOrganizer Department of Brain SciencesContact Abstract Show full text abstract about Many experiments provide evidences that, after learning, hum...» Many experiments provide evidences that, after learning, human and animal memories are very dynamic and changeable. Amongst others, one intriguing and counterintuitive effect is the destabilization of memories by recalling them. In addition, some of these destabilized memories can be ‘rescued’ by sleep-induced consolidation while others not. Up to now, the basic principles underlying these effects are widely unknown. In this talk I will present our theoretical model in which the interaction between the biologically well-established processes of synaptic plasticity and scaling enables the formation of memories or rather Hebbian cell assemblies in neural networks. Furthermore, we can show that the dynamics of these cell assemblies are comparable to the intriguing dynamics of human and animal memories described above. Thus, this model serves as a further step to link biological processes on the neuronal scale to behavior on the psychological level.
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Date:06WednesdayMay 2015Lecture
Forum on Mathematical Principles in Biology
More information Time 10:00 - 11:00Title Can we realize Lamarckian evolution in the lab?Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Tzachi Pilpel
Dept of Molecular GeneticsOrganizer Department of Molecular Cell BiologyContact -
Date:06WednesdayMay 2015Lecture
Mapping the resistance potential of Influenza against an antiviral
More information Time 10:00 - 11:00Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. Isaiah (Shy) Arkin
Dept. of Biol. Chem., Hebrew Univ. of JerusalemOrganizer Department of Biomolecular SciencesContact -
Date:06WednesdayMay 2015Lecture
Radiation Pressure on Photoionized Plasma, Application to Active Galactic Nuclei
More information Time 10:15 - 11:15Location Dannie N. Heineman LaboratoryLecturer Ari Laor, Technion Organizer Nella and Leon Benoziyo Center for AstrophysicsContact Abstract Show full text abstract about Photoionization models calculate the energy transfer from th...» Photoionization models calculate the energy transfer from the
ionizing radiation to the gas. The associated momentum transfer
is not always included. This radiation pressure will set the density
structure within the photoionized gas, in particular if the gas is
not radially accelerating. I will present the results of such
calculations for photoionized gas in Active Galactic Nuclei, which
provide a simple explanation for a range of properties observed. -
Date:06WednesdayMay 2015Lecture
Minimum Free-Energy Paths Obtained from Umbrella Sampling
More information Time 11:00 - 11:00Location Perlman Chemical Sciences BuildingLecturer Prof. Johannes Kaestner
Institute for Theoretical Chemistry, University of StuttgartOrganizer Department of Molecular Chemistry and Materials ScienceContact -
Date:06WednesdayMay 2015Lecture
Active sensing in bats - the long and short of it
More information Time 13:00 - 13:00Location Nella and Leon Benoziyo Building for Brain ResearchLecturer Dr. Stefan Greif
Max Planck Institute of Ornithology, Seewiesen, GermanyOrganizer Department of Brain SciencesContact Abstract Show full text abstract about Bats have a unique view of the world: ‘seeing&...» Bats have a unique view of the world: ‘seeing’ their environment with their ears through echolocation. They use this active sensing system to master their predominantly dark world, e.g. for detecting and targeting of small insect prey, navigating through complex vegetation or interaction with other individuals. Over the last decades we have developed a solid understanding of how bats apply echolocation to achieve this. However, many questions are still unsolved, e.g. assessment of larger objects like trees or even whole habitats. In my talk, I will show how bats recognize and deal with water surfaces. My results demonstrate that a recognition pattern can be very simple: for bats any smooth surface is perceived as a water surface. Likely through a long evolutionary consolidation without any contradicting experiences, this is phylogenetically wide spread among bats, extremely hardwired and even innate. In addition I will talk about the integration of varying sensory input, the role of spatial memory and potential evolutionarytraps that may arise from this.
Echolocation is a rather short-ranged sensing system, which leaves the intriguing question of how bats orientate and navigate over long distances. They face this challenge not only during daily foraging trips but also on migration routes which can be over 1,000 kilometers long. Recent evidence has shown that bats can, for example, make use of the Earth’s magnetic field. However, the exact functional mechanism of this ability is as yet largely unknown. In this context, I will present data showing that our tested bat species recognizes the sky’s polarization pattern at dusk and uses it as a calibrating system for its magnetic compass. This is the only known case so far for a mammal to use this sensory light cue.