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אוקטובר 01, 2009
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Date:23שנימאי 2011הרצאה
Bacteria Collective Behaviors and Decision Making
More information שעה 14:15 - 14:15מיקום בניין הפיזיקה ע"ש עדנה וק.ב. וייסמןמרצה Eshel Ben-Jacob
Tel-Aviv Universityמארגן המחלקה לפיזיקה של מערכות מורכבותצרו קשר תקציר Show full text abstract about Bacteria, the first and most fundamental of all organisms, l...» Bacteria, the first and most fundamental of all organisms, lead rich social life in complex hierarchical communities. Collectively, they gather information from the environment, learn from past experience, and take decisions. To solve the new encountered problems they first assess the problem via collective sensing, recall stored information of past experience and then they all participate in distributed information processing. The billions of bacteria in the colony use sophisticated communication strategies to link the intracellular computation networks of each bacterium (including signaling pathways of billions of molecules) into a network of networks. I will then show illuminating movies of swarming intelligence of live bacteria in which they solve challenging optimization problems for collective decision making. I will explain that current game theory is too simplistic to account for bacteria's decision making and that understanding bacteria's reactions to stressful and hazardous conditions may help to understand human decision-making processes. Bacteria are simpler yet they can effectively control the individual decision process leading to group decisions for the well-being of the entire colony. -
Date:23שנימאי 2011הרצאה
Clustering and Approximating High-Dimensional Streaming Data Using Coresets
More information שעה 14:30 - 14:30מיקום Ziskind Bldg.מרצה Dan Feldman
Caltechמארגן הפקולטה למתמטיקה ומדעי המחשב -
Date:23שנימאי 2011סימפוזיונים
An expedition into the world of atoms by aberration-corrected electron optics
More information שעה 15:15 - 16:30מיקום בניין הפיזיקה ע"ש עדנה וק.ב. וייסמןמרצה KNUT W. URBAN
Peter Grünberg Institute & Ernst Ruska Centre for Microscopy and Spectroscopy with Electrons, Research Centre Jülich, Jülich, Germanyמארגן המחלקה לפיזיקה של חלקיקים ואסטרופיזיקהצרו קשר תקציר Show full text abstract about The realization of aberration-corrected lenses has triggered...» The realization of aberration-corrected lenses has triggered a quantum jump in electron optics. The re-cent generation of transmission electron microscopes with aberration-corrected optics allows materials science in atomic dimensions and to measure individual atomic positions with picometer precision. This fulfils an old dream of condensed matter physics to derive macroscopic materials properties directly from observations on the atomic level. However in order to realize this ultra-high resolution it has to be accepted that optics in atomic dimensions is based on quantum physics and that the term “image” looses its conventional meaning. As a consequence access to the atomic-resolution information requires the numerical inversion of the non-linear imaging process by quantum-mechanical and optical image calculations on the basis of solutions of the Dirac equation. After a brief introduction into the basics of aberration-corrected electron optics and the physics of atomic-resolution microscopy studies on ferroelectric perovskitic oxides will be presented which provided new insight into the subtle atom relaxations forming the basis for the particular electronic properties of these materials. -
Date:23שנימאי 2011הרצאה
Equivalences in the generalized Kostant problem
More information שעה 16:00 - 16:00מיקום Ziskind Bldg.מרצה Prof. Anthony Joseph
מארגן הפקולטה למתמטיקה ומדעי המחשב -
Date:23שנימאי 2011הרצאה
מפגשים בחזית המדע
More information שעה 19:15 - 19:15מארגן יחידת שוהם במכון דוידסוןדף בית צרו קשר -
Date:24שלישימאי 2011הרצאה
Chromatographic Techniques in the Biological Chemistry Department
More information שעה 10:00 - 10:00מיקום בניין וולפסון למחקר ביולוגימרצה Dr. Daniel Tal
Department of Biological Chemistry -WISמארגן המחלקה למדעים ביומולקולרייםצרו קשר -
Date:24שלישימאי 2011הרצאה
"Integrating out geometry: Holographic Wilsonian RG and the membrane paradigm"
More information שעה 10:30 - 11:30מיקום Neve-Shalomמרצה Prof. Hong Liu
MITמארגן המחלקה לפיזיקה של חלקיקים ואסטרופיזיקהצרו קשר -
Date:24שלישימאי 2011הרצאה
“Photoinduced functions in multicomponent molecular systems”
More information שעה 11:00 - 11:00כותרת Department of Organic Chemistryמיקום בניין הלן ומילטון קימלמןמרצה Prof. Alberto Credi
Photochemical Nanosciences Laboratory, Dipartimento di Chimica “G. Ciamician”, Università degli Studi di Bologna, Bologna, Italyמארגן המחלקה לכימיה מולקולרית ולמדע חומריםצרו קשר תקציר Show full text abstract about Light-induced processes are at the basis of fundamental natu...» Light-induced processes are at the basis of fundamental natural phenomena as well as of a variety of applications. Since the functions that can arise from the interaction between light and matter depend on the degree of complexity and organization of the receiving ‘matter’, the research on these processes has progressively moved from molecular to supramolecular (multicomponent) systems. Examples of multicomponent systems capable to perform specific functions under light stimulation (photochemical molecular devices, PMDs) have been developed, relying on processes such as photoisomerization and photoinduced electron or proton transfer.
Here I will describe a few recent examples of PMDs studied in our laboratories, designed to (i) gather, transfer and process binary information (molecular logic gates and circuits) or (ii) undergo controllable motions of some molecular components with respect to the others (molecular machines).
Apart from futuristic applications, investigations on PMDs can increase the basic understanding of a variety of processes, as well as develop reliable theoretical models. This research has also the important merit of stimulating the ingenuity of chemists, thereby instilling new life into chemical sciences.
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Date:24שלישימאי 2011הרצאה
"Higher spin theories and holography"
More information שעה 11:45 - 13:00מיקום Neve-Shalomמרצה Dr. Simone Giombi
Perimeter Instituteמארגן המחלקה לפיזיקה של חלקיקים ואסטרופיזיקהצרו קשר -
Date:24שלישימאי 2011הרצאה
Tuning transcriptional noise by modulating promoter dynamics
More information שעה 12:15 - 12:15מיקום בניין וולפסון למחקר ביולוגימרצה Maya Dadiani
from Dr. Eran Segal’s labמארגן המחלקה לביולוגיה מולקולרית של התאצרו קשר -
Date:24שלישימאי 2011הרצאה
REGULATION OF HIPPOCAMPAL PLASTICITY: FROM DYNAMICS OF SINGLE SYNAPSES TO ALZHEIMER’S DISEASE
More information שעה 12:30 - 12:30מיקום בניין יעקב זיסקינדמרצה Dr. Inna Slutsky
Dept of Physiology and Pharmacology Tel Aviv Universityמארגן המחלקה למדעי המוחצרו קשר תקציר Show full text abstract about It is widely believed that memories are encoded and stored i...» It is widely believed that memories are encoded and stored in the pattern and strength of synaptic connections. Individual synapses, the elementary units of information transfer, encode and store new information in response to the environmental changes through structural and functional reorganization. The key mechanisms that normally maintain plasticity of synapses and initiate synapse loss in neurodegenerative diseases remain elusive. To target this question, we developed an integrative approach to correlate structure and function at the level of single synapses in hippocampal circuits. Utilizing FRET spectroscopy, optical imaging, electrophysiology and molecular biology we explore the casual relationship between the pattern of ongoing neuronal activity, structural rearrangements within the synaptic signaling complexes and plasticity of single synapses and whole networks. Our results suggest that ongoing background synaptic activity critically determines the number and plasticity of synapses in hippocampal circuits. -
Date:24שלישימאי 2011הרצאה
LECTURE CANCELLED:"China's climate change mitigation policies and positions"
More information שעה 13:00 - 14:00מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Dr. Ying Chen
Senior Researcher, Deputy Director of Research Centre for Sustainable Development (RCSD), Chinese Academy of Social Sciences (CASS)מארגן בית הספר למחקר - מכון ויצמן למדעצרו קשר -
Date:24שלישימאי 2011הרצאה
A refinement of the Ray-Singer analytic torsion
More information שעה 16:00 - 16:00מיקום Ziskind Bldg.מרצה Maxim Braverman
Northeastern Universityמארגן הפקולטה למתמטיקה ומדעי המחשב -
Date:24שלישימאי 2011הרצאה
קפה מדע
More information שעה 19:30 - 19:30מארגן יחידת שוהם במכון דוידסוןדף בית צרו קשר -
Date:25רביעימאי 2011הרצאה
The Involvement of Microtubules in Neuronal Polarity and Migration Regulation: Implications for Brain Development and Human Disease
More information שעה 10:00 - 10:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Prof. Orly Reiner
Dept. of Molecular Genetics, WISצרו קשר -
Date:25רביעימאי 2011הרצאה
"Using deep sequencing to inform attempts to generate C4 rice"
More information שעה 10:00 - 11:00מיקום בניין אולמן למדעי החייםמרצה Dr. Sarah Covshoff
Department of Plant Sciences, University of Cambridgeמארגן המחלקה למדעי הצמח והסביבהצרו קשר -
Date:25רביעימאי 2011אירועי תרבות
האישה ששתלה עצים
More information שעה 15:00 - 17:30מיקום בניין וולפסון למחקר ביולוגימרצה Natalia Gutkowski דף בית צרו קשר -
Date:26חמישימאי 2011הרצאה
MAGNETIC RESONANCE SEMINAR
More information שעה 09:00 - 09:00מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. John H. Enemark
Department of Chemistry and Biochemistry University of Arizona, Tucson, Arizona, USAמארגן המחלקה לפיזיקה כימית וביולוגיתצרו קשר -
Date:26חמישימאי 2011הרצאה
"Teaching old metals new tricks: stable Pd(III) complexes for stoichiometric and catalytic transformations"
More information שעה 10:00 - 10:00כותרת Organic Chemistry - special seminarמיקום בניין הלן ומילטון קימלמןמרצה Dr. Julia Khusnutdinova
the Department of Chemistry at Washington University.מארגן המחלקה לכימיה מולקולרית ולמדע חומריםצרו קשר -
Date:26חמישימאי 2011הרצאה
Critical slowdown for the Ising model on the two-dimensional lattice
More information שעה 11:00 - 11:00מיקום Ziskind Bldg.מרצה Eyal Lubetzky
Microsoft Researchמארגן הפקולטה למתמטיקה ומדעי המחשב