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  • Date:17ראשוןדצמבר 2017

    Screening in Concentrated Electrolyte Solutions: A Few Recent Thoughts

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    שעה
    11:00 - 12:00
    מיקום
    בניין פרלמן למדעי הכימיה
    Room 404
    מרצה
    Prof. Philip Pincus
    University of California at Santa Barbara
    מארגן
    המחלקה לחומרים ופני שטח
    צרו קשר
    תקצירShow full text abstract about Surface force experiments by the Perkin group suggest that ...»
    Surface force experiments by the Perkin group suggest that the Debye screening length in aqueous solutions is not monotonic in electrolyte concentration. I shall review the fundamentals of Debye-Huckel theory and discuss some possible scenarios to understand the experimental observations.
    הרצאה
  • Date:18שנידצמבר 2017

    Systematic dissection of dynamic post-transcriptional RNA regulation

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    שעה
    13:00 - 14:00
    מיקום
    בניין וולפסון למחקר ביולוגי
    Auditorium
    מרצה
    Dr. Michal Rabani
    Department of Molecular and Cellular Biology, Harvard University
    מארגן
    המחלקה לביולוגיה מולקולרית של התא
    צרו קשר
    הרצאה
  • Date:18שנידצמבר 2017

    Unexpected Adventures with Human Endogenous Retroviruses and Centromeres

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    שעה
    14:00
    מיקום
    בניין ארתור ורושל בלפר למחקר ביורפואי
    Botnar Auditorium
    מרצה
    Prof. David Markovitz
    מארגן
    המחלקה לגנטיקה מולקולרית
    צרו קשר
    הרצאה
  • Date:18שנידצמבר 2017

    Turbulence in a Localized Puff in a Pipe

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    שעה
    14:15
    מיקום
    בניין הפיסיקה ע"ש עדנה וק.ב. וייסמן
    Drory Auditorium
    מרצה
    Prof. Alex Yakhot
    Department of Mechanical Engineering Ben-Gurion University
    מארגן
    המחלקה לפיסיקה של מערכות מורכבות
    צרו קשר
    תקצירShow full text abstract about We have performed direct numerical simulations of transient ...»
    We have performed direct numerical simulations of transient turbulence in pipe flow for Re=2,250 which is established as a threshold of an equilibrium puff. We investigate the structure of an individual puff by considering three-dimensional snapshots across a long time-period. To assimilate the velocity data, we apply a conditional sampling based on the location of the maximum energy of the transverse (turbulent) motion. Specifically, at each time instance, we follow a turbulent puff by a three-dimensional moving-window centered at that location. We collected a snapshot-ensemble of the velocity fields acquired over 10,000 time instances (snapshots) inside the moving-window. The considered fow is intermittent and transitional. The velocity field inside the puff shows the dynamics of a developing turbulence. The localized puff is about of 12-15 pipe diameters long with almost laminar trailing and leading edges. In the puff core, despite the low Reynolds number, along the moving-window, it takes the downstream short distance of several pipe diameters to form the state of developed turbulence, when the turbulence statistics becomes similar to fully-developed turbulent pipe flow; the velocity profile becomes flat in the pipe core and logarithmic near the wall. It is shown that this “fully-developed turbulent slot” is very narrow, about two pipe diameters; it is localized and moves with a puff.
    הרצאה
  • Date:18שנידצמבר 2017

    Foundations of Computer Science Seminar

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    שעה
    14:30 - 16:00
    כותרת
    Improved Pseudorandomness for Unordered Branching Programs through Local Monotonicity
    מיקום
    בניין יעקב זיסקינד
    Room 290C
    מרצה
    Avishay Tal
    Stanford University
    מארגן
    הפקולטה למתמטיקה ומדעי המחשב, המחלקה למדעי המחשב ומתמטיקה שימושית, המחלקה למתמטיקה
    צרו קשר
    הרצאה
  • Date:18שנידצמבר 2017

    מליאת פקולטות מדעי החיים

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    שעה
    15:00 - 18:00
    מיקום
    מרכז כנסים על-שם דויד לופאטי
    Kimmel Auditorium
    צרו קשר
    אירועים אקדמיים
  • Date:19שלישידצמבר 201721חמישידצמבר 2017

    Israel-Turkey meeting on nanoscale science

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    שעה
    08:00 - 08:00
    מיקום
    מרכז כנסים על-שם דויד לופאטי
    Kimmel Auditorium
    יושב ראש
    Reshef Tenne
    דף בית
    צרו קשר
    כנסים
  • Date:19שלישידצמבר 2017

    Frontiers in Systems Biology

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    שעה
    10:00 - 11:00
    כותרת
    Modulating Translation
    מיקום
    בניין ארתור ורושל בלפר למחקר ביורפואי
    Botnar Auditorium
    מרצה
    Prof. Mihaela Zavolan
    Biozentrum, University of Basel, Switzerland
    מארגן
    מכון עזריאלי למערכות ביולוגיות
    צרו קשר
    תקצירShow full text abstract about In yeast, the knock out of individual ribosomal protein (RP)...»
    In yeast, the knock out of individual ribosomal protein (RP) genes
    leads to a wide range of life span phenotypes, some mutants having
    significantly increased, other significantly decreased life span. In
    this talk I would like to present our efforts in characterizing the
    regulation of mRNA translation in relation to cellular states, from
    yeast to man. I will describe our work on inferring determinants of
    protein synthesis rates in yeast, where we found that the Gcn4
    transcription factor, which is induced in many conditions that enhance
    yeast lifespan (RP gene knockout, calorie restriction, mTOR
    inhibition) not only activates transcription of amino acid
    biosynthesis genes, but also represses protein biosynthesis. How much
    variation in RP expression is expected in human tissues has been
    largely unknown, but RP gene mutations have been described in
    association with hematological disorders. Through a comprehensive
    analysis of human RP mRNAs expression pattern across 28 tissues, over
    300 primary cells and 16 tumor types, we identified many RPs which
    exhibit tissue-specific expression. In the hematopoietic system, a
    small number of RP genes, possible regulated by transcription factors
    with tissue-specific expression, unequivocally discriminate cells of distinct
    lineages and developmental stages. Different cancer types also show
    dysregulated expression of individual RPs, some RPs having a relative
    increase and other decrease in expression. Finally, I will discuss our efforts
    in mapping sites of snoRNA-guided RNA modifications.
    הרצאה
  • Date:19שלישידצמבר 2017

    The control on Phosphatidylserine exposure during axonal degeneration

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    שעה
    10:00 - 10:30
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    Auditorium
    מרצה
    Dr. Vered Shacham
    Members - Dept. of Biomolecular Sciences-WIS
    מארגן
    המחלקה למדעים ביומולקולריים
    צרו קשר
    תקצירShow full text abstract about During developmental pruning or in response to injury, axona...»
    During developmental pruning or in response to injury, axonal remnants of degenerated axons are engulfed by local or professional phagocytes. While several engulfment receptors have been implicated in the recognition of axon remnants, the signal that marks degenerating axons for phagocytosis, as well as the intrinsic mechanism that controls its exposure, are poorly understood. We used a series of in vitro assays to show that Phosphatidylserine (PS), a known “eat me” signal, is exposed on axons undergoing pruning or Wallerian degeneration. Importantly, we demonstrate that PS exposure is spatially controlled on sub-axonal segments undergoing degeneration and masking PS hinders the engulfment of axonal debris. Our results also show that PS exposure is regulated by the upstream activators of axonal pruning and Wallerian degeneration. However, our investigation of signaling further downstream revealed divergence between axon degeneration and PS exposure. Overall, our results suggest that the levels of PS on the outer axonal membrane can be dissociated from the degeneration process and that PS serves as an axonal “eat me” signal for engulfment.
    הרצאה
  • Date:19שלישידצמבר 2017

    T-cell immune suppression by the cytoplasmic tail of the HIV gp41 fusion protein

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    שעה
    10:30 - 11:00
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    Auditorium
    מרצה
    Yoel A. Klug
    Members - Dept. of Biomolecular Sciences-WIS
    מארגן
    המחלקה למדעים ביומולקולריים
    צרו קשר
    תקצירShow full text abstract about HIV enters its host cells by membrane fusion, initiated by t...»
    HIV enters its host cells by membrane fusion, initiated by the gp41 subunit of its envelope protein. In addition, gp41 has been shown to prevent T-cell activation. This is suggested to occur during the membrane fusion process and is attributed to various membrane binding regions of gp41. Although extensively studied, the cytosolic region of gp41, termed the cytoplasmic tail (CT), has not been examined in the context of immune suppression. Here we investigated whether the CT inhibits T-cell activation by utilizing gp41 derived peptides and full gp41 constructs expressed in human T-cells. We found that a conserved region of the CT specifically inhibits T-cell activation through a unique inhibitory mechanism able to take place post membrane fusion.
    הרצאה
  • Date:19שלישידצמבר 2017

    Algebraic Geometry and Representation Theory Seminar

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    שעה
    11:15 - 12:30
    כותרת
    L-function of cuspidal representations of G_2 and their poles
    מיקום
    בניין יעקב זיסקינד
    Room 290C
    מרצה
    Avner Segal
    University of British Columbia
    מארגן
    הפקולטה למתמטיקה ומדעי המחשב, המחלקה למדעי המחשב ומתמטיקה שימושית, המחלקה למתמטיקה
    צרו קשר
    הרצאה
  • Date:19שלישידצמבר 2017

    Bacteria and the future of agriculture: from sequence to function

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    שעה
    11:30
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    Auditorium
    מרצה
    Dr. Asaf Levy
    Microbial Program The Lawrence Berkeley National Laboratory (LBL) US DOE (Department of Energy) Joint Genome Institute managed by University of California, USA
    מארגן
    המחלקה למדעי הצמח והסביבה
    צרו קשר
    פרטים נוספיםShow full text description of Host: Dr. Assaf Gal...»
    Host: Dr. Assaf Gal
    הרצאה
  • Date:19שלישידצמבר 2017

    "How changes to the cellular environment modulate protein structure, function, and interaction"

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    שעה
    14:00 - 15:00
    מיקום
    בניין הלן ומילטון קימלמן
    Dov Elad Room
    מרצה
    Dr. Shahar Sukenik
    University of Illinois
    מארגן
    המחלקה לביולוגיה מבנית
    צרו קשר
    הרצאה
  • Date:20רביעידצמבר 2017

    Developmental Club Series 2017-2018

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    שעה
    10:00 - 11:00
    כותרת
    "How a key interface between the brain’s neuro-hormonal and vascular systems is assembled"
    מיקום
    בניין ארתור ורושל בלפר למחקר ביורפואי
    Botnar Auditorium
    מרצה
    Gil Levkowitz
    מארגן
    המחלקה לגנטיקה מולקולרית
    צרו קשר
    הרצאה
  • Date:20רביעידצמבר 2017

    Algebraic Geometry and Representation Theory Seminar

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    שעה
    11:15 - 12:30
    כותרת
    A Bavula conjecture
    מיקום
    בניין יעקב זיסקינד
    Room 290C
    מרצה
    Lenny Makar-Limanov
    Wayne University
    מארגן
    הפקולטה למתמטיקה ומדעי המחשב, המחלקה למדעי המחשב ומתמטיקה שימושית, המחלקה למתמטיקה
    צרו קשר
    הרצאה
  • Date:21חמישידצמבר 2017

    The Dipole Polarizability of a Water Molecule in the Condensed Phase

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    שעה
    11:00 - 12:00
    מיקום
    בניין פרלמן למדעי הכימיה
    Room 404
    מרצה
    Prof. Robert DiStasio Jr.
    Dept. of Chemistry and Chemical Biology, Cornell University
    מארגן
    המחלקה לחומרים ופני שטח
    צרו קשר
    הרצאה
  • Date:21חמישידצמבר 2017

    Quantization of heat flow in the fractional quantum Hall regime

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    שעה
    11:15 - 12:30
    מיקום
    בניין הפיסיקה ע"ש עדנה וק.ב. וייסמן
    Auditorium
    מרצה
    TBA
    מארגן
    הפקולטה לפיסיקה
    צרו קשר
    פרטים נוספיםShow full text description of 11:00 Coffee, Tea and more ...»
    11:00 Coffee, Tea and more
    תקצירShow full text abstract about Quantum mechanics sets an upper bound on the amount of charg...»
    Quantum mechanics sets an upper bound on the amount of charge flow as well as on the amount of heat flow in ballistic one-dimensional channels. The two relevant upper bounds, which combine only fundamental constants, are the quantum of the electrical conductance, Ge=e2/h, and the quantum of the thermal conductance, Gth=0T=(π2kB2/3h)T. Remarkably, the latter does not depend on the particles charge, particles exchange statistics, and is expected also to be insensitive to the interaction strength among the particles. However, unlike the relative ease in observing the quantization of the electrical conductance, measuring accurately the thermal conductance is more challenging.
    The universality of the Gth quantization in 1D ballistic channels was demonstrated for weakly interacting particles: phonons [1], photons [2], and in an electronic Fermi-liquid [3]. I will describe our recent experiments with heat flow in a strongly interacting system of 2D electrons in the fractional quantum Hall regime. In the lowest Landau level we studied particle-like states (v<½) and the more complex hole-like states (½<v<1), which carry counter propagating neutral (zero net charge) modes [4]. We found quantization of Gth=0T in all these abelian states. In the first-excited Landau level (2<v<3), we concentrated on the even-denominator v=5/2 state, and found fractional quantization of the thermal conductance, Gth=½0T – a definite mark of a non-abelian state - harboring Majorana excitations [5].

    1. K. Schwab, et al., Nature 404, 974 (2000)
    2. M. Meschke, et al., Nature 444, 187 (2006)
    3. S. Jezouin, et al., Science 342, 601 (2013)
    4. M. Banerjee et. al., Nature 545, 75 (2017)
    5. M. Banerjee et. al., arXiv: 1710.00492

    סימפוזיונים
  • Date:21חמישידצמבר 2017

    "Gender in practice: the user’s guide"

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    שעה
    11:30 - 13:00
    מיקום
    אולם הרצאות ע"ש גרהרד שמידט
    מרצה
    Dr. Zeev Lehrer
    צרו קשר
    פרטים נוספיםShow full text description of Social psychologist and sociologist , lecturer at the Gender...»
    Social psychologist and sociologist , lecturer at the Gender Studies program at Tel Aviv university and the Peres Academic Center.
    A well known expert and consultant in the field of gender in organization.
    תקצירShow full text abstract about Dr. Zeev Lehrer presents a different, practical point of vie...»
    Dr. Zeev Lehrer presents a different, practical point of view on the confluence between gender and organizations. Suspending questions of justice, responsibility and blame, Lehrer supplies simple and practical tools to manage and solve real gender problems in real life situations.
    הרצאה
  • Date:21חמישידצמבר 2017

    Vision and Robotics Seminar

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    שעה
    12:15 - 13:30
    כותרת
    “Zero-Shot” Super-Resolution using Deep Internal Learning
    מיקום
    בניין יעקב זיסקינד
    Room 1
    מרצה
    Assaf Shocher
    Weizmann Institute
    מארגן
    הפקולטה למתמטיקה ומדעי המחשב, המחלקה למדעי המחשב ומתמטיקה שימושית, המחלקה למתמטיקה
    צרו קשר
    הרצאה
  • Date:24ראשוןדצמבר 2017

    From perception to action: imaging human brain function

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    שעה
    08:30 - 13:30
    מיקום
    מרכז כנסים על-שם דויד לופאטי
    Kimmel Auditorium
    יושב ראש
    Alon Chen
    מארגן
    המחלקה לנוירוביולוגיה
    דף בית
    צרו קשר
    כנסים

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