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תוצאות חיפוש לאירועים

  • Date:01רביעיפברואר 2023

    The development and molecular mechanisms of crystal-forming cells

    More information
    שעה
    10:00 - 11:00
    מיקום
    בניין ארתור ורושל בלפר למחקר ביורפואי
    Botnar Auditorium
    מרצה
    Dr. Dvir Gur
    Departments of Molecular Genetics
    מארגן
    המחלקה למדעי המוח
    צרו קשר
    פרטים נוספיםShow full text description of Host: Dr. Meital Oren meital.oren@weizmann.ac.il...»
    Host: Dr. Meital Oren
    meital.oren@weizmann.ac.il
    הרצאה
  • Date:01רביעיפברואר 2023

    M.Sc thesis defense: “Fermi-polaron description of excitonic scattering processes in layered systems from first principles”

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    שעה
    11:00 - 12:00
    מיקום
    בניין פרלמן למדעי הכימיה
    Room 404
    מרצה
    Guy Voscoboynik
    M.Sc student of Dr. Sivan Refaely Abramson
    מארגן
    המחלקה לכימיה מולקולרית ולמדע חומרים
    צרו קשר
    תקצירShow full text abstract about Layered materials exhibit unique charge and energy transfer ...»
    Layered materials exhibit unique charge and energy transfer characteristics, making them promising candidates for emerging photophysical and photochemical applications, and particularly in energy conversion and quantum information science. In two-dimensional systems, spatial confinement in a certain dimension causes reduced dielectric screening and enhanced Coulomb interaction compared to bulk materials. Upon light excitation, the relaxation processes of the charge and energy carriers, as well as their rearrangement in the lateral plane, allow for unique and structure-specific interaction dynamics of the electrons and holes in these systems and of their bound states - neutral and charged excitons. In particular, these dimensionality effects induce strong exciton-electron and exciton-hole interactions in doped or gated systems, where optical excitations coexist alongside electronic excitations. These interactions dominate the exciton decay and diffusion and introduce bound three-particle states in such systems. A many-particle theoretical picture of the formation and propagation of these states is crucial for proper tracking and understanding of the interaction pathways, crystal momentum effects, the involved particle-particle coupling and their relation to the underlying structure, dimensionality, and symmetry.

    הרצאה
  • Date:01רביעיפברואר 2023

    Resilience of photosynthetic organisms in changing environments: from Cyanobacteria to Plants

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    שעה
    15:30 - 16:30
    מיקום
    Via Zoom: https://weizmann.zoom.us/j/95255951733?pwd=ckNINThodTFWL0s3Rm1KSHgvVnU5QT09
    מרצה
    Dr. Giovanna Capovilla
    MIT
    מארגן
    המחלקה למדעי הצמח והסביבה
    צרו קשר
    הרצאה
  • Date:02חמישיפברואר 2023

    Personalized medicine based on deep human phenotyping

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    שעה
    09:00
    מיקום
    בניין ע"ש מקס ולילאן קנדיוטי
    Auditorium
    מרצה
    Dr. Adina Weinberger
    Biomedical Research Unit
    מארגן
    המחלקה לתשתיות מחקר מדעי החיים
    צרו קשר
    הרצאה
  • Date:02חמישיפברואר 2023

    Physics Colloquium

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    שעה
    11:15 - 12:30
    כותרת
    Quantum materials by design
    מיקום
    בניין הפיסיקה ע"ש עדנה וק.ב. וייסמן
    Auditorium
    מרצה
    Prof. Cory Dean
    מארגן
    הפקולטה לפיסיקה
    דף בית
    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 The electronic properties of a material are dictated by both...»
    The electronic properties of a material are dictated by both the composition and arrangement of its atomic lattice. Combining elemental atoms selected from the periodic table in principle provides for infinite variety of materials to be realized. However, thermodynamic constraints limit which atoms may bond into which symmetry classes; materials may or may not be air sensitive; synthesis conditions may be impractical; impurities and defects may substantially obscure intrinsic electronic properties; and the resulting electron behaviour may not be predictive owing to phenomena such as strong electron interactions, spontaneous magnetic ordering, fermi-surface reconstruction or other effects not captured by single-particle band-structure calculations. In this talk, I will explore new approaches to synthesizing quantum materials by augmenting the atomic lattice structure in 2D materials with a superimposed superlattice potential. Artificially engineering lattice potentials provide opportunities to synthesize materials beyond the periodic table, with the ultimate promise to be able to realize and manipulate arbitrary electronic states, by design. Opportunities and challenges, in this exciting new field will be reviewed, and the prospects for quantum simulation in a solid-state platform will be discussed.

    סימפוזיונים
  • Date:02חמישיפברואר 2023

    Active vision and vision for action

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    שעה
    12:30 - 13:30
    מיקום
    אולם הרצאות ע"ש גרהרד שמידט
    מרצה
    Prof. Daniel Kerschensteiner
    Washington University School of Medicine St. Louis
    מארגן
    המחלקה למדעי המוח
    צרו קשר
    פרטים נוספיםShow full text description of Host-Dr. Michal Rivlin michal.rivlin@weizmann.ac.il...»
    Host-Dr. Michal Rivlin michal.rivlin@weizmann.ac.il
    תקצירShow full text abstract about  Vision is an active sense in which an animal's gaze an...»
     Vision is an active sense in which an animal's gaze and pupil shape the content of the retinal image. In the first part of my talk, I will discuss how the viewing strategies of mice align with the neural architecture of their visual system to accomplish an essential visual task: predation. In the second part of my talk, I will compare the hunting behavior of mice to that of a specialized predator, similar in size but distant in evolution, and present our initial insights into the organization of visual information in this animal. Finally, I will present ongoing work indicating that the pupillary reflex arc implements a more complex stimulus-response function than previously thought. I will discuss the underlying neural mechanisms and potential purpose and show conservation from mice to humans. 

    הרצאה
  • Date:02חמישיפברואר 2023

    Faculty Seminar

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    שעה
    12:45 - 14:00
    כותרת
    Computational Imaging for Scientific Discovery: From Cloud Physics to Black Holes Dynamics
    מיקום
    בניין יעקב זיסקינד
    Room 1
    מרצה
    Aviad Levis
    Caltech
    מארגן
    המחלקה למדעי המחשב ומתמטיקה שימושית
    Seminar
    צרו קשר
    פרטים נוספיםShow full text description of Imaging plays a key role in advancing science, from revealin...»
    Imaging plays a key role in advancing science, from revealing the internal structure of clouds to providing the first visual evidence of a black hole. While both examples come from different imaging systems, they illustrate what can be achieved with modern computational approaches. Computational imaging combines concepts from physics, machine learning, and signal processing to reveal hidden structures at the smallest and largest of scales. In this talk, I will highlight how peeling away layers of the underlying physics leads to a spectrum of algorithms targeting new scientific discoveries. I will focus on the Event Horizon Telescope (EHT), a unique computational camera with the goal of imaging the glowing fluid surrounding supermassive black holes. In May of 2022, the EHT collaboration revealed the first images of the black hole at the center of our galaxy: Sagittarius A* (Sgr A*). These images were computationally reconstructed from measurements taken by synchronized telescopes around the globe. While images certainly offer interesting insights, looking toward the future, we are developing new computational algorithms that aim to go beyond a 2D image. For example, could we use EHT observations to recover the dynamic evolution or even the 3D structure? We tackle these challenges by integrating emerging AI concepts with physics models. Our hope is that in the not-too-distant future, these new and exciting prospects will enable scientific discovery and even provide a glimpse into the very nature of space-time itself in our galaxy's most extreme environment.


    Bio:
    Aviad Levis is a postdoctoral scholar in the Department of Computing and Mathematics at Caltech, working with Prof. Katherine Bouman. Currently, as part of the Event Horizon Telescope collaboration, his work focuses on developing novel computational methods for imaging black hole dynamics. Prior to that, he received his Ph.D. (2020) from the Technion and his B.Sc. (2013) from Ben-Gurion University. Notably, his Ph.D. research into 3D remote sensing of clouds is a key enabler in a novel interdisciplinary space mission (CloudCT) funded by the ERC and led by Yoav Schechner, Ilan Koren, and Klaus Schilling. Aviad is a recipient of the Zuckerman and the Viterbi postdoctoral fellowships.

    תקצירShow full text abstract about Imaging plays a key role in advancing science, from revealin...»
    Imaging plays a key role in advancing science, from revealing the internal structure of clouds to providing the first visual evidence of a black hole. While both examples come from different imaging systems, they illustrate what can be achieved with modern computational approaches. Computational imaging combines concepts from physics, machine learning, and signal processing to reveal hidden structures at the smallest and largest of scales. In this talk, I will highlight how peeling away layers of the underlying physics leads to a spectrum of algorithms targeting new scientific discoveries. I will focus on the Event Horizon Telescope (EHT), a unique computational camera with the goal of imaging the glowing fluid surrounding supermassive black holes. In May of 2022, the EHT collaboration revealed the first images of the black hole at the center of our galaxy: Sagittarius A* (Sgr A*). These images were computationally reconstructed from measurements taken by synchronized telescopes around the globe. While images certainly offer interesting insights, looking toward the future, we are developing new computational algorithms that aim to go beyond a 2D image. For example, could we use EHT observations to recover the dynamic evolution or even the 3D structure? We tackle these challenges by integrating emerging AI concepts with physics models. Our hope is that in the not-too-distant future, these new and exciting prospects will enable scientific discovery and even provide a glimpse into the very nature of space-time itself in our galaxy's most extreme environment.
    //
    Bio:
    Aviad Levis is a postdoctoral scholar in the Department of Computing and Mathematics at Caltech, working with Prof. Katherine Bouman. Currently, as part of the Event Horizon Telescope collaboration, his work focuses on developing novel computational methods for imaging black hole dynamics. Prior to that, he received his Ph.D. (2020) from the Technion and his B.Sc. (2013) from Ben-Gurion University. Notably, his Ph.D. research into 3D remote sensing of clouds is a key enabler in a novel interdisciplinary space mission (CloudCT) funded by the ERC and led by Yoav Schechner, Ilan Koren, and Klaus Schilling. Aviad is a recipient of the Zuckerman and the Viterbi postdoctoral fellowships.
    הרצאה
  • Date:02חמישיפברואר 2023

    Geometric Functional Analysis and Probability Seminar

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    שעה
    13:30 - 14:30
    כותרת
    A phase transition in zero count of stationary Gaussian processes
    מיקום
    בניין יעקב זיסקינד
    Room 155
    מרצה
    Naomi Feldheim
    BIU
    מארגן
    המחלקה למדעי המחשב ומתמטיקה שימושית
    Seminar
    צרו קשר
    תקצירShow full text abstract about Let f be a stationary Gaussian process on R with compactly s...»
    Let f be a stationary Gaussian process on R with compactly supported spectral measure. The expected number of zeroes is computed by the celebrated Kac-Rice formula, and much is known about their typical behavior. In this talk we are interested in their large deviations: What is the probability to see many more zeroes (overcrowding) or many less zeroes (undercrowding) than expected in a long interval?

    We show that overcrowding and undercrowding probabilities exhibit a phase transition between exponential and Gaussian behavior.
    The critical points of the transition are determined by the support of the spectrum.
    This result complements previous bounds given by Basu-Dembo-F.-Zeitouni and by Priya.

    Based on ongoing joint work with Ohad Feldheim and Lakshmi Priya.
    הרצאה
  • Date:02חמישיפברואר 2023

    Epigenetic Liquid Biopsy

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    שעה
    14:00 - 15:00
    מרצה
    Prof. Yuval Dor
    Department of Developmental Biology and Cancer Research The Institute for Medical Research Israel-Canada The Hebrew University-Hadassah Medical School
    מארגן
    המכון לחקר הטיפול בסרטן עש דואק
    Cancer Research Club
    צרו קשר
    פרטים נוספיםShow full text description of הלינק לחדר בזום הינו כמו בפוסטר הקודם: Meeting ID: 506 5...»
    הלינק לחדר בזום הינו כמו בפוסטר הקודם:

    Meeting ID: 506 540 2023
    Password: 223081
    Meeting URL: https://weizmann.zoom.us/j/5065402023?pwd=a3Z6KzRCU0xJaUFoM2Y5emZwZm1oZz09


    הרצאה
  • Date:02חמישיפברואר 2023

    Silver mines, the rise of money and the advent of democracy

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    שעה
    14:00
    כותרת
    EPS Department and Kimmel Center for Archaeological Science
    מיקום
    בניין משפחת זוסמן
    M. Magaritz Seminar Room
    מרצה
    Prof. Francis Albarède
    École Normale Supérieure de Lyon, France
    מארגן
    המחלקה למדעי כדור הארץ וכוכבי הלכת
    צרו קשר
    תקצירShow full text abstract about Over the last 2½ millenia, the world economy depended on pre...»
    Over the last 2½ millenia, the world economy depended on prevailing currencies: the Athenian owl (530-
    168 BCE), the Roman denarius (211 BCE-250 AD), the Spanish piece-of-eight (16th to 18th C), and today
    the US dollar. These reference monies were accepted everywhere and all, at least in the beginning, were
    made of silver. What is so special about this metal? Silver is useless and rare, but still abundant enough to
    match the wealth of nations and of their long-distance trade.
    Silver ores are associated with rare and recent tectonic environments, the Mediterranean world, notably
    the periphery of the Aegean Sea and Southern Iberia, and the American cordillera, Peru and Mexico. In
    contrast, they were markedly scarce in South and East Asia.
    After the virtual destruction of soils by the Anatolian farmers at the end of the Bronze Age, the Near and
    Middle East societies depended almost exclusively on the agriculture of Egypt and Mesopotamia. The
    Late Bronze Age collapse (ca. 1200 BCE) corresponded to the migration of Greek people and resulted in
    the annihilation of all the empires outside of the flood plains. Silver by weight was nevertheless used to
    save populations from famine and trade wheat, barley and copper.
    Military innovations, hoplites and their phalanx, were, with silver mines, the main resources of the Greeks.
    Mercenaries received their wages in silver, notably through the tributes exacted in silver by the
    Achaemenid (Persion) kings. By minting silver, the returning Greek mercenaries emerged as strong middle
    classes . They soon claimed their share of the power, toppled the tyrants, and installed democracy in
    many poleis from Greece and Southern Italy. Modern economics teaches us that egalitarian distribution of
    wealth is unfortunately unstable and this case is well illustrated by Syracuse.
    At the beginning of the common era, the Roman Empire found itself the owner of centuries of silver
    extracted from Greece and from Iberia. This bullion was used to buy luxury products, frankincense from
    Arabia, spices and cotton from India, ivory and precious wood from Africa. Leakage of silver towards the
    Indian Ocean was so strong that coins were quickly debased by copper and by 250 AD most of the silver
    had been lost. The progressive replacement of silver by a bimetallic system, gold for the rich and bronze
    for the working class, progressively fractured the society and ushered the brutal Middle Age regimes.
    Silver famine had finally destroyed the democratic ideal of the Greeks. This is food for thought as
    disappearing mining resources may severely affect our current vision of societies.
    הרצאה
  • Date:02חמישיפברואר 2023

    Silver mines, the rise of money and the advent of democracy

    More information
    שעה
    14:00
    מיקום
    בניין משפחת זוסמן
    M. Magaritz Seminar Room
    מרצה
    Prof. Francis Albarède
    École Normale Supérieure de Lyon, France
    צרו קשר
    פרטים נוספיםShow full text description of Please follow the link or Zoom ID to join remotely. Join Zo...»
    Please follow the link or Zoom ID to join remotely.
    Join Zoom Meeting:
    https://weizmann.zoom.us/j/4845901524?pwd=dkYybWIvTXVSaW40YmF2TEVxVFg0UT09

    Meeting ID: 484 590 1524
    Meeting password: 045940
    הרצאה
  • Date:05ראשוןפברואר 2023

    Forecasting surface weather and storm tracks at one-month leads: role of the stratosphere and the Madden Julian Oscillation

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    שעה
    11:00
    מיקום
    בניין משפחת זוסמן
    M. Magaritz Seminar Room
    מרצה
    Chaim Garfinkel
    The Hebrew University of Jerusalem
    מארגן
    המחלקה למדעי כדור הארץ וכוכבי הלכת
    צרו קשר
    תקצירShow full text abstract about The traditional approach to weather forecasting on one- to t...»
    The traditional approach to weather forecasting on one- to two-week timescales utilizes weather forecasting models, but on timescales longer than two weeks, the value of deterministic (or ensemble-based probabilistic) forecasts weakens. This is due to the presence of chaotic variability in the atmosphere. Yet certain modes of variability in the climate system have timescales longer than this two-week threshold, and the key to longer-scale prediction is to take advantage of these modes when they open up windows of opportunity. By understanding the impacts of these modes of variability on surface weather, the potential for improved forecasts on a monthly timescale can be demonstrated and eventually realized. 
    Two such classes of modes of variability are stratospheric variability (both in the tropical and polar stratosphere) and tropical tropospheric variability (e.g. the Madden-Julian Oscillation and El Nino). For example, both polar stratospheric sudden warmings and the Madden-Julian Oscillation have been shown to influence European and Mediterranean weather, but it is unclear (1) what mechanism(s) underlie these connections, (2) how far in advance the impacts can be predicted, (3) what governs the magnitude of the surface impact, and (4) how well models capture these connections. This talk will review progress made towards addressing these issues over the past several years in my group.
    הרצאה
  • Date:05ראשוןפברואר 2023

    Touch and Go: The multifaceted roles of singlet oxygen in plant stress signaling

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    שעה
    14:00 - 15:00
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    Room 690
    מרצה
    Dr. Eugene Koh
    Temasek Life Sciences Laboratories
    מארגן
    המחלקה למדעי הצמח והסביבה
    צרו קשר
    הרצאה
  • Date:06שניפברואר 2023

    Meeting of the Israel Plant Science Society

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    שעה
    08:00 - 08:00
    מיקום
    אודיטוריום מיכאל סלע
    יושב ראש
    Tamir Klein
    צרו קשר
    כנסים
  • Date:06שניפברואר 2023

    Geometry and Topology Seminar

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    שעה
    09:15 - 10:45
    כותרת
    Hyperbolic dynamics and oscillatory motions in the 3 Body Problem
    מיקום
    בניין יעקב זיסקינד
    Room 155
    מרצה
    Pau Martin
    U. Politecnica de Catalunia
    מארגן
    המחלקה למדעי המחשב ומתמטיקה שימושית
    Seminar
    צרו קשר
    פרטים נוספיםShow full text description of Consider the planar 3 Body Problem with mas...»




    Consider the planar 3 Body Problem with masses $m_0,m_1,m_2
    הרצאה
  • Date:07שלישיפברואר 2023

    iSCAR seminar

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    שעה
    09:00
    מיקום
    בניין ע"ש מקס ולילאן קנדיוטי
    Auditorium
    מרצה
    Prof. Hellmut Augustin
    מארגן
    המחלקה לאימונולוגיה ורגנרציה ביולוגית
    צרו קשר
    הרצאה
  • Date:07שלישיפברואר 2023

    Antimicrobial Peptides against Multidrug-Resistant Biofilm from Cystic Fibrosis Patients

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    שעה
    10:00 - 11:00
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    Cafeteria
    מרצה
    Daniel Ben Hur
    Dept. of Biomolecular Sciences-WIS
    מארגן
    המחלקה למדעים ביומולקולריים
    צרו קשר
    הרצאה
  • Date:07שלישיפברואר 2023

    From Spin Materials to Electron Transfer Catalysis

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    שעה
    11:00 - 12:00
    מיקום
    אולם הרצאות ע"ש גרהרד שמידט
    מרצה
    Prof. Swadhin K Mandal
    Department of Chemical Sciences, Indian Institute of Science Education and Research, Kolkata
    מארגן
    המחלקה לכימיה מולקולרית ולמדע חומרים
    צרו קשר
    תקצירShow full text abstract about The major concerns about industrially used catalytic systems...»
    The major concerns about industrially used catalytic systems today are: i) the high cost of catalysts; ii) the toxicity of heavy transition metals; iii) difficulties in removing trace amounts of toxic-metal residues from the desired product; and, finally, iv) rare transition metal depletion, which does not meet the requirement of sustainable development. Developing environmentally friendly catalysts is an excellent option in this regard. Naturally, the most recent catalyst development trend heralded a new era of metal-free catalysis or catalysts based on earth-abundant, nontoxic, and low-cost metals. This talk will go over our recent advances [1-4] in using small molecules to systematically mimic transition metal-based catalysis. We designed electron transfer catalysis using the smallest polycyclic odd alternant hydrocarbon, phenalenyl (PLY)-based molecules, which was inspired by a completely different field of molecular spin materials [5]. This talk will focus on how to avoid transition metals when performing various cross-coupling catalysis.
    הרצאה
  • Date:07שלישיפברואר 2023

    The pyrenoid: a liquid-liquid phase separated CO2 fixing organelle

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    שעה
    11:30 - 12:30
    מיקום
    בניין לביוכימיה על שם נלה וליאון בנוזיו
    Auditorium
    מרצה
    Prof. Luke Mackinder
    University of York
    מארגן
    המחלקה למדעי הצמח והסביבה
    צרו קשר
    פרטים נוספיםShow full text description of Host: Dr. Assaf Gal...»
    Host: Dr. Assaf Gal
    הרצאה
  • Date:07שלישיפברואר 2023

    Mapping brainstem nuclei structure and connectivity in health and disease 

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    שעה
    12:30 - 13:30
    מיקום
    אולם הרצאות ע"ש גרהרד שמידט
    מרצה
    Dr. Marta Bianciardi
    Radiology, Harvard Medical School Martinos Center for Biomedical Imaging, MGH
    מארגן
    המחלקה למדעי המוח
    צרו קשר
    פרטים נוספיםShow full text description of Host: Dr. Michal Ramot michal.ramot@weizmann.ac.il For ac...»
    Host: Dr. Michal Ramot michal.ramot@weizmann.ac.il

    For accessibility issues contact:naomi.moses@weizmann.ac.il
    תקצירShow full text abstract about Brainstem nuclei in humans play a crucial role in vital func...»
    Brainstem nuclei in humans play a crucial role in vital functions, such as arousal, autonomic homeostasis, sensory and motor relay, nociception, and sleep and have been implicated in a vast array of brain pathologies, including disorders of consciousness, sleep disorders, autonomic disorders, pain, Parkinson’s disease and other motor disorders. Yet, an in vivo delineation of most human brainstem nuclei location and connectivity using conventional imaging has been elusive because of limited sensitivity and contrast for detecting these small regions using standard neuroimaging methods. In this talk, Dr. Bianciardi will present the probabilistic atlas and connectome of 31 brainstem nuclei of the arousal, motor, autonomic and sensory systems developed by her team in healthy living humans using structural, functional and diffusion-based MRI at 7 Tesla. She will also show the translatability of 7 Tesla connectivity results to conventional 3 Tesla imaging. Dr Bianciardi will conclude her seminar by presenting the first translational application of the brainstem nuclei atlas to investigate arousal and motor mechanisms in traumatic coma and premanifest synucleinopathy.
    הרצאה

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