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אפריל 30, 2015
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Date:06רביעיינואר 2016הרצאה
Machine Learning and Statistics Seminar
More information שעה 11:15 - 12:30כותרת TBAמיקום בניין יעקב זיסקינדמרצה Karen Livescu
TTI Chicagoמארגן הפקולטה למתמטיקה ומדעי המחשבצרו קשר תקציר Show full text abstract about TBA ...» TBA -
Date:06רביעיינואר 2016הרצאה
The Synaptonemal Complex is a Liquid Crystal
More information שעה 12:00 - 12:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Dr. Ofer Rog
UC Berkeleyמארגן המחלקה לגנטיקה מולקולריתצרו קשר -
Date:06רביעיינואר 2016הרצאה
Recent Neutrino Cross-Section Results from T2K
More information שעה 13:30 - 15:00מיקום Tel Aviv University, Schreiber 008מרצה Erez Reinherz-Arnois
Colorado State Universityמארגן המחלקה לפיזיקה של חלקיקים ואסטרופיזיקהדף בית צרו קשר -
Date:06רביעיינואר 2016הרצאה
Braginsky Center for the Interface between the Sciences and the Humanities
More information שעה 14:00 - 14:00כותרת The Quaternary megafauna, human’s peopling of the Americas and the sixth extinctionמיקום אולם הרצאות ע"ש גרהרד שמידטמארגן המחלקה לפיזיקה כימית וביולוגיתצרו קשר תקציר Show full text abstract about In the vastness of geological time, the biodiversity increas...» In the vastness of geological time, the biodiversity increased since the paucity of the Precambrian barren world until the richness of the biological species in the present. Along the last 540 million years, ie since there are abundant fossils in the record, many mass extinctions have been observed, whose proposed causes are mostly considered to have been the impact of large extraterrestrial objects.
The decrease in the diversity, especially among many mammals and birds, can arguably been assigned to the impact of humans. Such diversity crisis begun already in Pleistocene times as human populationd colonised new territories. In particular, the South American megafauna, an impressive array of many giant mammals of peculiar taxonomy, disappeared near the Pleistocene-Holocene limit, when the evidence of human presence started to be more profuse.
However, the evidence of such interaction between humans and the megafauna is scarce. Among them, a site in southern South America contributes to the debate with marks on megafaunal bones at an unexpectedly old age.
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Date:06רביעיינואר 2016הרצאה
Chemical Physics Department Guest Seminar
More information שעה 14:00 - 14:00כותרת Enhanced Ultracold Molecule Formation with Shaped Nanosecond Chirped Pulsesמיקום בניין פרלמן למדעי הכימיהמרצה Prof Phillip L. Gould
Physics Department University of Connecticutמארגן המחלקה לפיזיקה כימית וביולוגיתצרו קשר תקציר Show full text abstract about Ultracold molecules are currently a topic of great interest ...» Ultracold molecules are currently a topic of great interest in AMO physics. One method for forming such molecules is photoassociation, where two colliding atoms absorb a photon and are bound into an excited molecule. We examine a variation of this process in Rb2, using frequency-chirped light on the nanosecond time scale. In the case of a positive chirp, the photoassociation can be followed by stimulated emission into a high vibrational level of the lowest-lying (metastable) triplet state. We show that this two-step process can be enhanced by a judicious shape of the chirp. Quantum simulations of the molecular formation are not only in good agreement with the experimental results, but also give insight into the enhancement mechanism. -
Date:07חמישיינואר 2016הרצאה
Pelletron series - by invitation
More information שעה כל היוםצרו קשר -
Date:07חמישיינואר 2016הרצאה
Magnetic Resonance Seminar
More information שעה 09:45 - 09:45כותרת Single-shot MRI with exceptional resilience to magnetic field inhomogeneitiesמיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Lucio Frydman
Chemical Physics, WISמארגן המחלקה לפיזיקה כימית וביולוגיתצרו קשר -
Date:07חמישיינואר 2016סימפוזיונים
Special chemistry colloquium
More information שעה 11:00 - 13:15כותרת "Molecular mechanisms of virus entry" "Cellular dynamics imaged in real-time with high temporal and spatial resolution"מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Steve Harrison and Prof. Tom Kirchhausen מארגן הפקולטה לכימיהצרו קשר -
Date:07חמישיינואר 2016סימפוזיונים
Understanding self-replication
More information שעה 11:15 - 12:30מיקום בניין הפיזיקה ע"ש עדנה וק.ב. וייסמןמרצה Nathalie Balaban
HUJIמארגן הפקולטה לפיזיקהצרו קשר תקציר Show full text abstract about The process of self-replication is at the core of Biological...» The process of self-replication is at the core of Biological systems. Therefore, understanding the constraints that act on the process of self-replication is crucial. However, little is known about the physical and evolutionary constraints that shape the observed behavior of Biological Systems. We show that molecular noise can be exploited by bacteria to spread the time-scale of self-replication. However noise is not always the underlying cause of variability in clonal cells populations. We show that the variability of self-replication times in mammalian cells is governed by a deterministic process. -
Date:07חמישיינואר 2016הרצאה
Communication between viruses guides lysis-lysogeny decisions
More information שעה 12:15 - 13:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Zohar Erez (Sorek group) מארגן הפקולטה לביולוגיהצרו קשר -
Date:07חמישיינואר 2016הרצאה
The role of IL-1 and IL-6 signaling in T cell differentiation and CNS inflammation
More information שעה 14:00 - 15:00כותרת Guest Seminarמיקום בניין וולפסון למחקר ביולוגימרצה Prof. Ari Waisman
Johannes Gutenberg University of Mainzמארגן המחלקה לאימונולוגיה מערכתיתצרו קשר -
Date:07חמישיינואר 2016הרצאה
Peletron Series - by invitation
More information שעה 16:00 - 17:45מיקום Peletronצרו קשר -
Date:07חמישיינואר 2016אירועי תרבות
ערב "שירת המדע" לזכרו של פרופ' עפר לידר - הכניסה חופשית
More information שעה 19:30 - 22:45מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:09שבתינואר 2016אירועי תרבות
רן אלירן ונירית מיליס שרים את שירי רן ונמה
More information שעה 20:30 - 22:00מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:10ראשוןינואר 2016הרצאה
Two new perspectives on high-latitude atmospheric temperature profiles and their sensitivity to climate change
More information שעה 11:00 - 11:00מיקום בניין משפחת זוסמןמרצה Timothy Cronin
Harvard Universityמארגן המחלקה למדעי כדור הארץ וכוכבי הלכתצרו קשר תקציר Show full text abstract about The high-latitude vertical structure of temperature is poorl...» The high-latitude vertical structure of temperature is poorly understood, yet is an important factor in the polar amplification of climate change. To better understand the high-latitude lapse rate and its sensitivity to various forcings, we explore two perspectives on the high-latitude temperature structure.
The first is the Lagrangian perspective of Arctic air formation. We prescribe the initial sounding of the atmosphere representing an air column starting over the ocean, then allow the air mass to evolve for two weeks in the absence of any solar heating and with a very low heat capacity surface underneath (representing the movement of the air column over high-latitude sea ice or a continental interior). Using a single-column model, we find that a low-cloud feedback slows cooling of the surface and amplifies continental warming, increasing the continental surface air temperature by roughly two degrees for each degree increase of the initial maritime surface air temperature. We discuss extension with a 2D cloud-resolving model, and applications to past and future warm climates.
The second is the Eulerian perspective of radiative-advective equilibrium. High latitude temperature profiles are generally stable to convection, with frequent surface-based inversions, especially in winter. Such profiles result from the stabilizing influences of advective heat flux convergence and atmospheric solar absorption, which dominate over the destabilizing influences of surface solar absorption and subsurface heating. We formulate an analytical model for the high-latitude temperature profile, using prescribed heat flux convergence and either gray- or windowed-gray thermal radiative transfer. We discuss how climate feedbacks in this state depend on the type of forcing, and compare temperature feedbacks in high-latitude radiative-advective equilibrium to the more familiar case of low-latitude radiative-convective equilibrium.
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Date:10ראשוןינואר 2016הרצאה
TBD
More information שעה 12:00 - 13:00מיקום מעבדה על-שם דני נ. היינמןמרצה Scott Tremaine מארגן מרכז לאסטרופיסיקה עש נלה וליאון בנוזיוצרו קשר -
Date:10ראשוןינואר 2016הרצאה
Gatad2a-Chd4-Mbd3 Axis in the NuRD complex Facilitates Deterministic Induction of Pluripotenc
More information שעה 13:00 - 13:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואימרצה Nofar Mor
Yaqub Hanna's group, Dept. of Molecular Genetics, WISמארגן המחלקה לגנטיקה מולקולריתצרו קשר -
Date:10ראשוןינואר 2016הרצאה
Magnetic Resonance Seminar
More information שעה 16:00 - 16:00כותרת Towards an Understanding of Radiation Necrosis and its Treatment:Lessons from a Preclinical Modelמיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Dr. Joel Garbow
Washington Universityמארגן המחלקה לפיזיקה כימית וביולוגיתצרו קשר -
Date:11שניינואר 201612שלישיינואר 2016כנסים
Workshop on the Resolution Revolution in 3D Cryo-Electron Microscopy
More information שעה כל היוםמיקום מרכז כנסים על-שם דויד לופאטייושב ראש Sharon G. Wolfדף בית צרו קשר -
Date:11שניינואר 2016סימפוזיונים
"Interfacial Complexions & Thermodynamic Transitions at Interfaces"
More information שעה 11:00 - 12:15מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Wayne Kaplan
Department of Materials Science and Engineering, Technionמארגן הפקולטה לכימיהצרו קשר תקציר Show full text abstract about Since the 1980s it has been recognized that the structure of...» Since the 1980s it has been recognized that the structure of grain boundaries in polycrystalline ceramics can have a diffuse nature, characterized by a ~1nm thick nominally amorphous film. More recently, the structure of grain boundaries has been described following diffuse interface theory, stating that the structure and chemistry of grain boundaries, interfaces and surfaces can go through two dimensional transitions between thermodynamic states (sometimes termed complexions). As an example, surface reconstruction is a first order complexion transition, equivalent to a discontinuous change in the level of adsorbed excess. As such complexions for interfaces are analogous to phases in bulk, although they are not bulk phases. In the past these conclusions have been reached based on structural characterization of grain boundaries and interfaces correlated with mechanical and electrical properties, and more recently it has been shown that specific complexions can have a significant influence on grain boundary mobility, and thus the morphology of an evolving microstructure.
To date, almost all of these studies have been conducted at grain boundaries in single phase polycrystalline systems, which by definition are not at equilibrium, and in some cases it is not even clear if the identified complexions are at steady-state. Similar questions have been raised for studies focusing on metal-ceramic interfaces from thin film studies, where the deposition process used to form the samples may be very far from equilibrium.
This presentation will focus on an experimental approach to address the structure, chemistry and energy of complexions at (metal-ceramic) interfaces which are fully equilibrated, from which it can be demonstrated that formation of a complexion at equilibrium minimizes interface energy. This will be compared with complexions at solid-liquid interfaces, where a region of ordered liquid exists adjacent to the interface at equilibrium, and the details of a reconstructed solid-solid interface where the reconstructed interface structure accommodates lattice mismatch for a nominally incoherent interface. These three systems will be compared to known reconstructed solid surfaces, which can also be described as complexions, within a more generalized Gibbs adsorption isotherm.