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October 01, 2009
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Date:27SundayDecember 2009Lecture
"Luminescent Solar Concentrators with efficiency exceeding 10%"
More information Time 11:00 - 11:00Location Sussman Family Building for Environmental SciencesLecturer Dr. Carmel Rotschild
Electrical Engineering Department, MIT, Massachusetts Institute of Technology.Organizer Department of Earth and Planetary SciencesContact -
Date:27SundayDecember 2009Lecture
Phylogenetic Tree Reconstruction with Insertions and Deletions
More information Time 11:00 - 11:00Location Jacob Ziskind BuildingLecturer Avinatan Hassidim
M.I.T.Organizer Faculty of Mathematics and Computer Science -
Date:27SundayDecember 2009Lecture
Continuum models for membrane dynamics
More information Time 11:00 - 11:00Location Perlman Chemical Sciences BuildingLecturer Prof. Frank Brown
Department of Chemistry and Biochemistry Department of Physics University of California Santa Barbara, CA, USAOrganizer Department of Molecular Chemistry and Materials ScienceContact Abstract Show full text abstract about Simulation of biomembranes and model membrane systems over l...» Simulation of biomembranes and model membrane systems over length and time scales relevant to cellular biology is not currently feasible with Molecular Dynamics or related atomically-detailed methods. Barring an unforeseen revolution in the computer industry, this situation will not change for several decades. Two aspects of membrane dynamics will be discussed: out-of-plane membrane undulations and in-plane flow/diffusion in inhomogeneous membrane systems. Both problems are treated within the context of continuum models, which allow access to length and time scales up to and beyond the micron and second regimes, using simple numerical methods. A number of effects relevant to the motion of integral membrane proteins as well as the dynamics of phase separation and domain fluctuations in multi-component lipid bilayers will be presented. -
Date:27SundayDecember 2009Lecture
Equilibrium Configurations of Synchronous Binaries and Applications to the Kuiper Belt
More information Time 12:30 - 14:00Location Edna and K.B. Weissman Building of Physical SciencesLecturer O. Gnat
CaltechOrganizer Nella and Leon Benoziyo Center for AstrophysicsContact Abstract Show full text abstract about The equilibrium configurations of rotating fluid masses is a...» The equilibrium configurations of rotating fluid masses is a classical problem first studied by Newton in the context of the figure of the Earth. Equilibrium configurations for synchronous, uniform, binary systems were computed by Roche, under the assumption that the resulting configurations are ellipsoids orbiting in a Keplerian orbit. In modern astrophysical research these classical Roche ellipsoidal solutions are used in the study of a wide range of contact binaries, including binaries in the Kuiper belt. In this talk, I will describe the classical analytical approximations, and I will then present exact numerical computations of the equilibrium configurations of synchronous binaries, self-consistently taking into account the tidal and rotational deformations of both components, and relaxing the assumptions of ellipsoidal configurations and Keplerian rotation. The numerical models
result in non-ellipsoidal configurations in non-Keplerian orbits, but indicate that the analytical ellipsoids are, in most cases, a fair approximation. I will show the light curves resulting from the numerically computed equilibrium configurations, and compare these light curves with those computed using the
Roche approximations. Finally, I will demonstrate how these models can be
used to infer the physical properties of observed Kuiper Belt binaries by fitting the observed light curve of QG298. -
Date:27SundayDecember 2009Lecture
"Functional SDF-1 Secretion from Bone Marrow Stromal Cells is a Cell Contact-Dependent Event Mediated by Cx43 and Cx45 Gap-Junctions via Calcium and cAMP signaling"
More information Time 13:30 - 13:30Location Wolfson Building for Biological ResearchLecturer Amir Schajnovitz
Tzvee Lapidot's labOrganizer Department of Systems ImmunologyContact -
Date:27SundayDecember 2009Lecture
Exponential Logarithmic Series
More information Time 16:00 - 16:00Location Jacob Ziskind BuildingLecturer Salma Kuhlmann
University of KonstanzOrganizer Faculty of Mathematics and Computer Science -
Date:28MondayDecember 2009Colloquia
The Amazing Ribosome
More information Time 09:30 - 09:30Location Michael Sela AuditoriumLecturer 2009 Nobel Prize in Chemistry Laureate, Prof. Ada Yonath
Dept. of Structural Biology, WISOrganizer Faculty of ChemistryContact -
Date:28MondayDecember 2009Lecture
Phylogenomics and Darwin's Coral-of-Life in Light of Horizontal Gene Transfer
More information Time 11:00 - 12:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Professor J. Peter Gogarten
University of ConnecticutHomepage Contact Abstract Show full text abstract about Comparative genomics has provided many new insights into mic...» Comparative genomics has provided many new insights into microbial evolution. One of the surprises was the extent of horizontal gene transfer. In some respects gene transfer made understanding life’s history more difficult –phylogeny can no longer be described as a single steadily furcating tree-; however, the study of horizontal gene transfer also illustrates how new metabolic pathways are created, and in many instances transferred genes turned out to be excellent markers for cladistic classification. The seminar will discuss and illustrate Darwin's proposal to rename the Tree-of Life into the Coral-of-Life, the role of gene transfer from now extinct lineages, and the application of population genetic principles to higher taxonomic units. -
Date:28MondayDecember 2009Lecture
The wildfire problem of the United States: people, houses, and lightning
More information Time 11:00 - 11:00Location Sussman Family Building for Environmental SciencesLecturer Avi Bar Massada
Postdoctoral Research Associate Department of Forest and Wildlife Ecology University of WisconsinOrganizer Department of Earth and Planetary SciencesContact -
Date:28MondayDecember 2009Lecture
Controlling fate, motility and directed migration of germ cells in zebrafish
More information Time 13:00 - 13:00Location Arthur and Rochelle Belfer Building for Biomedical ResearchLecturer Dr. Erez Raz
Institute of Cell Biology, ZMBE, Munster, GermanyContact -
Date:28MondayDecember 2009Lecture
Correlation functions of spin chains
More information Time 14:15 - 14:15Location Edna and K.B. Weissman Building of Physical SciencesLecturer F. Goehmann, Univ of Wuppertal Organizer Department of Physics of Complex SystemsContact Abstract Show full text abstract about I describe the results of a long term project on the calcul...» I describe the results of a long term project on the
calculation and clarification of the mathematical structure of the
correlation functions of integrable systems. Our main model system
in this context is the XXZ spin chain which includes several interesting
relativistic and non-relativistic 1+1d quantum field theories as scaling
limits and also appears as a model for highly anisotropic magnetic
materials in solid state physics. Recently, it was established that
the static correlation functions of the XXZ-chain all factorize
(T. Miwa, M. Jimbo and F. Smirnov, arXiv:0811.0439) under rather general
conditions. This means that all correlation functions can be expressed
in terms of the one-point function and a special neighbour two-point
function (which may be understood as a kind of Wick theorem for an
interacting system). Those functions admit an efficient description
by means of linear and non-linear integral equation (H. Boos and F.
G\"ohmann, arXiv:0903.5043) which, in turn allows us to calculate
short-range correlation functions for the spin chain, say, at finite
temperature, in the thermodynamic limit with arbitrary numerical
precision (e.g. C. Trippe, F. G\"ohmann and A. Kl\"umper arXiv:0908.2232
and arXiv:0912.1739).
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Date:28MondayDecember 2009Lecture
Relations in algebraic complexity
More information Time 14:30 - 14:30Location Jacob Ziskind BuildingLecturer Amir Yehudayoff
Institute for Advanced StudyOrganizer Faculty of Mathematics and Computer Science -
Date:28MondayDecember 2009Lecture
Dr. Chaim Weizmann's Annual Memorial Lecture
More information Time 20:00 - 22:00Lecturer Prof. Avishai Margalit
Prof. Avishai Margalit is awarded the 2007 EMET Prize for his original and influential contribution in the fields of political thought, ethics and the philosophy of religion, and for his works dealing with the complex moral and political issues of this day and age. All these have made him one of the most important philosophers in Israel and abroad.Organizer Yad Chaim WeizmannContact -
Date:28MondayDecember 2009Cultural Events
The Israel Ballet-"Sleeping Beauty"
More information Time 20:30 - 20:30Contact -
Date:29TuesdayDecember 2009Lecture
Visualizing molecular processes within a bacterium
More information Time 10:00 - 10:00Location Wolfson Building for Biological ResearchLecturer Dr. Sigal Ben-Yehuda
Microbiology and Molecular Genetics Faculty of Medicine, Hebrew UniversityOrganizer Department of Biomolecular SciencesContact -
Date:29TuesdayDecember 2009Lecture
Qualitative properties of second-order quasi-linear elliptic and parabolic equations
More information Time 10:00 - 10:00Location Room 229 (Pekeris Room)Lecturer Prof. Vitali Liskevich
Swansea UniversityOrganizer Faculty of Mathematics and Computer Science -
Date:29TuesdayDecember 2009Lecture
"Stormwater harvesting & recycling filtration & Biofiltration systems for aquifer recharge in Israel"
More information Time 11:00 - 12:00Location Ullmann Building of Life SciencesLecturer Dr. Yaron Zinger
Facility for Advancing Water Biofiltration (FAWB) Institute for Susatainable Water Resources Dept. of Civil Engineering Monash University, Victoria, AustraliaOrganizer Department of Plant and Environmental SciencesContact -
Date:29TuesdayDecember 2009Lecture
"Metallic nano-clusters on oxide substrate as model catalyst"
More information Time 11:00 - 11:00Title Organic Chemistry - Departmenal SeminarLocation Helen and Milton A. Kimmelman BuildingLecturer Dr. Elad Gross
The Institute of Chemistry The Hebrew University of JerusalemOrganizer Department of Molecular Chemistry and Materials ScienceContact -
Date:29TuesdayDecember 2009Lecture
New Insights in MAPK signaling in living cells
More information Time 12:15 - 12:15Location Wolfson Building for Biological ResearchLecturer Cellina Cohen-Saidon Organizer Department of Molecular Cell BiologyContact Abstract Show full text abstract about Cells can respond to various stimulations by changing the lo...» Cells can respond to various stimulations by changing the localization of signaling proteins. One can imagine this as a computation, in which the dynamics of the signaling molecules in the cell represent the input signals. Using live-imaging of individual living cells, we follow the dynamic nuclear accumulation of the ERK2 protein of the MAPK signal transduction pathway upon stimulation with epidermal growth factor (EGF). We show that part of this computation of the response has a feature named fold-change response. The flow of information is further processed by yet unknown cellular mechanisms in a fold-change manner, suggesting that the ERK2 system compensates for natural biological noise despite large variation in nuclear basal levels.
Theoretical studies indicate that the fold-change response can be explained by one of the most common network motifs in topological networks, the incoherent feed-forward loop (I1-FFL). The fold-response feature of the I1-FFL applies to the entire shape of the response, including its amplitude and duration. Fold-response can help buffer cell-to-cell variation in the level of regulatory proteins, and help overcome noise in the signal. This provides a view of this signaling pathway at the individual cell level and suggests that fold rather than absolute changes in nuclear level characterize the response of this pathway.
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Date:29TuesdayDecember 2009Lecture
PKMzeta and the core molecular mechanism of long-term memory storage and erasure
More information Time 12:30 - 12:30Location Jacob Ziskind BuildingLecturer Prof. Todd Sacktor
SUNY Downstate Medical Center, Brooklyn, NYOrganizer Department of Brain SciencesContact Abstract Show full text abstract about How long-term memories are stored as physical traces in the ...» How long-term memories are stored as physical traces in the brain is a fundamental question in neuroscience. Most molecular work on LTP, a widely studied physiological model of memory, has focused on the early signaling events regulating new protein synthesis that mediates initial LTP induction. But what are the newly synthesized proteins that function in LTP maintenance, how do they sustain synaptic potentiation, and do they store long-term memory? Recent studies have identified a brain-specific, autonomously active, atypical PKC isoform, PKMzeta, that is central to the mechanism maintaining the late phase of LTP. In behavioral experiments, the persistent activity of PKMzeta maintains spatial memories in hippocampus, fear-motivated memories in amygdala, and, in work performed in the Dudai lab, elementary associative memories in neocortex. This is because 1-day to several month-old memories appear to be rapidly erased after local intracranial PKMzeta inhibition. PKMzeta, a persistently active enzyme, is thus the first identified molecular component of the long-term memory trace.