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תוצאות חיפוש לאירועים
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Date:19ראשוןמאי 202420שנימאי 2024מועצת המנהלים הבינלאומית
Executive Board and committee meetings 2024
More information שעה כל היוםמיקום מרכז כנסים על-שם דויד לופאטי
Kimmel Auditoriumצרו קשר -
Date:19ראשוןמאי 2024הרצאה
Floods in a warming climate: what are the missing puzzle pieces?
More information שעה 11:00מיקום בניין משפחת זוסמן
M. Magaritz Seminar Roomמרצה Efrat Morin
The Hebrew University of Jerusalemמארגן המחלקה למדעי כדור הארץ וכוכבי הלכתצרו קשר תקציר Show full text abstract about Flood is the outcome of complex processes interacting at a r...» Flood is the outcome of complex processes interacting at a range of scales. Flood generation and its magnitude depend on different precipitation and surface properties. As the climate becomes warmer globally, precipitation patterns are changing and, consequently, altering flood regimes. Resolving the expected changes in flood properties requires examining projections of precipitation features most correlated with floods. While the redistribution of mean annual precipitation amounts is generally known, the trends in many other essential factors controlling floods are yet to be resolved. For example, flash flood magnitude is sensitive to space-time rainstorm properties such as areal coverage or storm speed. Still, knowledge of how these properties are affected by global warming is lacking. Maximal rain rates for duration relevant to the watershed’s response time are also crucial parameters controlling the flood discharge. There is some understanding of how extreme rain rates change, but the magnitude and sign depend on the rain duration considered. Changes in frequency and the intra-seasonal distribution of precipitation events also affect flood regimes. Finally, watersheds of different properties are sensitive to different precipitation features, and thus, different watersheds may respond differently to global warming. In this talk, we will present the complexity of flood response under global warming and then focus on two questions: 1) how does global warming affect heavy precipitation events (HPEs) in the eastern Mediterranean, and 2) how these effects are imprinted in the resulting floods in small-medium Mediterranean watersheds.
We simulated 41 eastern Mediterranean HPEs with the high-resolution weather research and forecasting (WRF) model. Each event was simulated twice: under historical conditions and at the end of the 21st-century conditions (RCP8.5 scenario) using the “pseudo global warming” approach. Comparison of precipitation patterns from the paired simulations revealed that heavy precipitation events in our region are expected to become drier and more spatiotemporally concentrated, i.e., we expect higher rain rates on smaller coverage areas and shorter storm durations that, in total, yield lower amounts of rainfall.
These effects have some contradicting signs, and their full hydrological impact on streamflow peak discharge and volume was further explored. Ensembles of spatially-shifted rainfall data from the simulated HPEs were input to a high-resolution distributed hydrological model (GB-HYDRA) representing four small-medium-size watersheds (18–69 km2) in the eastern Mediterranean (Ramot Menashe). Flow volume is significantly reduced in future HPEs, while the change in flood peak is more complicated due to the combined effect of precipitation amount (decreasing) and precipitation rate (increasing). For the watersheds examined in this research, which are mostly agricultural, flood peaks at the watershed outlets are mostly reduced. The dynamics of flood generation at sub-watersheds of different sizes and properties are further examined in this research to understand scenarios for lowering or increasing flood peaks. This study emphasizes that detecting and quantifying global warming impact on space-time precipitation patterns is essential for flood regime projection. -
Date:20שנימאי 2024סימפוזיונים
Designing nanoparticles for biological environments: from quantum sensing to gene medicine
More information שעה 11:00 - 12:15מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Petr Cigler
Institute of Organic Chemistry and Biochemistry, Czech Academy of Sciencesמארגן המחלקה לפיסיקה כימית וביולוגיתדף בית צרו קשר תקציר Show full text abstract about The use of nanoparticles in diagnostics, therapeutics and im...» The use of nanoparticles in diagnostics, therapeutics and imaging has revolutionized these fields with new properties not available with small molecules. Nanoparticle interface provide possibilities for polyvalent and independent attachment of different molecules serving as recognition/targeting structures, optical probes, spin probes or catalysts. However, nanoparticles operating in biological environments require precise control of multiple factors related to surface chemistry and their composition. To avoid for example aggregation, off-target interactions, and protein corona formation, appropriate interface design is essential. This talk will present general nanoparticle design strategies and specific examples including nanodiamonds and lipid nanoparticles. -
Date:20שנימאי 2024הרצאה
Special Guest Seminar
More information שעה 11:00 - 12:00כותרת Tissue Stem Cells: Making Choices and Living with Them in Good Times and Badמיקום אולם ע"ש דולפי ולולה אבנרמרצה Prof. Elaine Fuchsמארגן המחלקה לאימונולוגיה ורגנרציה ביולוגיתצרו קשר -
Date:20שנימאי 2024הרצאה
Foundations of Computer Science Seminar
More information שעה 11:15 - 12:15כותרת Online Edge Coloringמיקום בניין יעקב זיסקינד
Room 155מרצה David Wajc
Technionמארגן המחלקה למדעי המחשב ומתמטיקה שימושית
Seminarצרו קשר תקציר Show full text abstract about Vizing’s Theorem provides an algorithm that edge colors any ...» Vizing’s Theorem provides an algorithm that edge colors any graph of maximum degree Δ using Δ 1 colors, which is necessary for some graphs, and at most one higher than necessary for any graph. In online settings, the trivial greedy algorithm requires 2Δ-1 colors, and Bar-Noy, Motwani and Naor in the early 90s showed that this is best possible, at least in the low-degree regime. In contrast, they conjectured that for graphs of superlogarithmic-in-n maximum degree, much better can be done, and that even (1 o(1))Δ colors suffice online. This would make edge coloring a rare problem, for which "online is (nearly) as easy as offline". In this talk I will outline the history of this conjecture, and its recent resolution, together with extensions of a flavor resembling classic and recent results on *list* edge-coloring and “local” edge-coloring.
Talk based in part on joint works with many wonderful and colorful collaborators, including Sayan Bhattacharya, Joakim Blikstad, Ilan R. Cohen, Fabrizio Grandoni, Seffi Naor, Binghui Peng, Amin Saberi, Aravind Srinivasan, Ola Svensson and Radu Vintan.
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Date:21שלישימאי 2024הרצאה
Molecular-level insights into light-induced reactions in biological systems from multiscale simulations
More information שעה 14:00 - 15:00מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Dr. Igor Shapiro
Hebrew Universityמארגן המחלקה לביולוגיה מבנית וכימיתצרו קשר -
Date:22רביעימאי 2024הרצאה
LS Luncheon
More information שעה 12:00 - 14:00מיקום בניין לביוכימיה על שם נלה וליאון בנוזיו
Auditoriumמרצה Prof. Neta Regev Rudzkiמארגן מדעי החייםצרו קשר -
Date:22רביעימאי 2024הרצאה
זרקור על מדע
More information שעה 13:00 - 14:00כותרת יחסי מבנה-תפקוד כמפתח לפענוח הקוד העצבימיקום אולם הרצאות ע"ש גרהרד שמידטמרצה אלון רובין
ד"רמארגן יחידת שוהם במכון דוידסון
Staff Scientists Seminarצרו קשר -
Date:23חמישימאי 2024סימפוזיונים
Physics Colloquium
More information שעה 11:15 - 12:30כותרת Quantum Dot Physics Using Atomic Defects in Ultrathin Tunnel Barriersמיקום בניין הפיסיקה ע"ש עדנה וק.ב. וייסמן
Auditoriumמרצה Prof. Hadar Steinberg
Hebrew Universityמארגן המחלקה לפיסיקה של חומר מעובהצרו קשר פרטים נוספים Show full text description of Refreshments at 11:00...» Refreshments at 11:00תקציר Show full text abstract about Quantum dots (QDs) are conducting regions which can localize...» Quantum dots (QDs) are conducting regions which can localize few charge carriers, and where the energy spectrum is dominated by Coulomb repulsion. QDs can be as large as few hundreds of nanometers, or as small as a single molecule, their sizes depending on their physical realization – whether in two-dimensional materials, nanowires, molecular systems.
In my talk I will describe our work on a new type of an atomically-sized QD, realized in defects residing in ultrathin two-dimensional insulators. These defect-dots are found in layered materials such as hexagonal Boron Nitride (hBN), which we study by their assembly into stacked devices. By using graphene electrodes, we are able to electronically couple to the QD, while allowing the QD energy to be externally tuned exploiting the penetration of electric field through graphene.
A consequence of the structure of our devices is that the defect QDs are placed at atomic distance to the conductors on both sides. I will show how the presence of such energy-tunable, atomically sized QDs at nanometer proximity to other conducting systems opens new opportunities for sensitive measurements, including use of QDs as highly sensitive spectrometers [1], or as single electron transistors, unique in their sensitivity to local electric fields at the nanometer scale [2]. I will discuss our future prospects of using defect QDs as quantum sensors.
References
1. Devidas, T.R., I. Keren, and H. Steinberg, Spectroscopy of NbSe2 Using Energy-Tunable Defect-Embedded Quantum Dots. Nano Letters, 2021. 21(16): p. 6931-6937.
2. Keren, I., et al., Quantum-dot assisted spectroscopy of degeneracy-lifted Landau levels in graphene. Nature Communications, 2020. 11(1): p. 3408.
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Date:23חמישימאי 2024הרצאה
Vision and AI
More information שעה 12:15 - 13:15כותרת 3D Motion Synthesis and Controlמיקום בניין יעקב זיסקינד
Lecture Hall - Room 1מרצה Sigal Raab
TAUמארגן המחלקה למדעי המחשב ומתמטיקה שימושית
Seminarצרו קשר תקציר Show full text abstract about Human motion is a fundamental attribute, underlying human ac...» Human motion is a fundamental attribute, underlying human actions, gestures, and behavior. Research of human motion has a wide range of applications, from medical simulations, through security, to entertainment. While the domain of deep learning for RGB image analysis has received huge attention, the domain of motion manipulation using DNNs, and more recently diffusion models, is in its infancy, and holds many scientific opportunities yet to be discovered.
Moreover, motion is challenging due to its irregular structure, diverse angles, and the expense and complexity of obtaining high-quality data. My research focuses on generative tasks such as motion synthesis and motion editing using deep neural networks. In the upcoming talk, I will discuss the building blocks used for motion synthesis and elaborate on various works that utilize diffusion models for synthesis and editing tasks. Each work addresses different aspects of the motion domain and involves various controls and tasks.
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Date:23חמישימאי 2024הרצאה
A guest lecture by Prof. Sarab Abu-Rabia Queder
More information שעה 13:00 - 14:15מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה פרופ' סראב אבורביעה-קווידר
סגנית נשיא לגיוון והכלה, אוניברסיטת בן גוריון בנגב. חוקרת ומרצה בכירה במחלקה לחינוך. זוכת דוקטורט כבוד, מכון ויצמן למדע 202צרו קשר -
Date:23חמישימאי 2024הרצאה
Geometric Functional Analysis and Probability Seminar
More information שעה 13:30 - 14:30כותרת Metric functional boundaries of groupsמיקום בניין יעקב זיסקינד
Room 155מרצה Ariel Yadin
BGUמארגן המחלקה למתמטיקה
Seminarצרו קשר תקציר Show full text abstract about Based on works of Busemann and Gromov, Anders Karlsson has p...» Based on works of Busemann and Gromov, Anders Karlsson has proposed a theory of “metric functionals” on a general metric space, as a replacement for linear functionals when there is no linear structure. for discrete spaces, these identify with “horofunctions”. We will discuss some aspects of these objects for “well suited” metrics on discrete groups. We are mainly interested in the interaction between the geometry and the algebraic properties of the group. for example, it seems that metric functionals can be useful in studying the structure of “small” groups, and understanding the existence of (virtual) characters. I am not assuming familiarity with any of the above notions, and plan to properly define everything presented in the talk. This is based on joint works with Liran Ron-George.
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Date:23חמישימאי 2024אירועים אקדמיים
ישיבת מועצה מדעית
More information שעה 14:00מיקום מרכז כנסים על-שם דויד לופאטי
Kimmel Auditoriumצרו קשר -
Date:26ראשוןמאי 2024הרצאה
The Clore Center for Biological Physics
More information שעה 13:15 - 14:30כותרת Phages vs bacteria warfare: co-evolution and intelligence gatheringמיקום המאיץ ע"ש קופלר במרכז קנדה לפיסיקה גרעיניתמרצה Prof. Yigal Meir
Ben-Gurion Universityמארגן מרכז לפיסיקה ביולוגית עש קלורצרו קשר פרטים נוספים Show full text description of Lunch will be served at 12:45...» Lunch will be served at 12:45תקציר Show full text abstract about The warfare between bacteria and phages - viruses that infec...» The warfare between bacteria and phages - viruses that infect bacteria - has been raging for billions of years. During this time both sides have evolved various attack and defense systems. In this talk I will describe 3 related projects: 1. Is there an optimal number of such defense or anti-defense systems? 2. How can different phages which prey on the same bacteria co-exist, in contradiction with the expected competitive exclusion? 3. Some phages have developed the ability to garner environmental information, enabling them to make more "intelligent" decisions. How much is such intelligence worth, in terms of other resources?
FOR THE LATEST UPDATES AND CONTENT ON SOFT MATTER AND BIOLOGICAL PHYSICS AT THE WEIZMANN, VISIT OUR WEBSITE: https://www.biosoftweizmann.com/
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Date:27שנימאי 2024הרצאה
Special Guest Seminar with Prof. Ehud Isacoff
More information שעה 10:00 - 11:00כותרת "Single molecule analysis of glutamate receptor conformational dynamics"מיקום בניין ארתור ורושל בלפר למחקר ביורפואי
Botnar Auditoriumמרצה Prof. Ehud Isacoffמארגן המחלקה לנוירוביולוגיה מולקולריתצרו קשר -
Date:27שנימאי 2024סימפוזיונים
AI (R)Evolution in (Quantum) Chemistry and Physics
More information שעה 11:00 - 12:15כותרת Annual Pearlman Lectureמיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Alexandre Tkatchenko
Theoretical Chemical Physics, University of Luxembourgמארגן המחלקה לכימיה מולקולרית ולמדע חומריםדף בית צרו קשר תקציר Show full text abstract about Learning from data has led to paradigm shifts in a multitude...» Learning from data has led to paradigm shifts in a multitude of disciplines, including web, text and image search and generation, speech recognition, as well as bioinformatics. Can machine learning enable similar breakthroughs in understanding (quantum) dynamics of molecules and materials? This is an especially relevant question given that quantum mechanical predictions are now within experimental uncertainties for complex molecular systems (https://www.nature.com/articles/s41586-023-06587-3).
Aiming towards a unified machine learning (ML) model of molecular interactions in chemical space, I will discuss the potential and challenges for using ML techniques in chemistry and physics. ML methods can not only accurately estimate molecular properties of large datasets, but they can also lead to new insights into chemical similarity, aromaticity, reactivity, and molecular dynamics. For example, the combination of reliable molecular data with ML methods has enabled a fully quantitative simulation of protein dynamics in water (https://www.science.org/doi/full/10.1126/sciadv.adn4397). While the potential of machine learning for revealing insights into molecules and materials is high, I will conclude my talk by discussing the many remaining avenues for development. -
Date:27שנימאי 2024הרצאה
Towards quantitative biology of developmental abnormalities
More information שעה 13:00 - 14:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואי
Botnar Auditoriumמרצה Prof. Stanislav Shvartsman
Dept of Molecular Biology Princeton Universityצרו קשר פרטים נוספים Show full text description of Host: Prof. Benny Shilo ...» Host: Prof. Benny Shiloתקציר Show full text abstract about Developmental disorders are severely understudied, in spite ...» Developmental disorders are severely understudied, in spite of their alarmingly high incidence, with 1 in 6 U.S. children having one or more disabilities or developmental delays. The main challenge is the design of statistically powered studies that can disentangle numerous genetic and environmental factors. We have been working towards addressing this challenge for the developmental abnormalities associated with the germline mutations within the ERK cascade. Focusing on mutations that affect MEK, a kinase that activates ERK, we demonstrated how studies of human mutations in Drosophila can answer the long-standing questions in the field. Specifically, we established how pathogenic mutations affect an isolated MEK protein, demonstrated how they disrupt the normal process of MEK activation in the cell, and quantified their effects on ERK signaling in embryos. More recently, our work shed light on the origins of phenotypic variability in the ERK-associated developmental disorders, demonstrating that they can be of purely stochastic origin. Given the generality of our approach, it should be applicable to other developmental abnormalities associated with genetically deregulated cell signaling. -
Date:28שלישימאי 2024הרצאה
To be announced
More information שעה 09:15 - 10:15מיקום בניין לביוכימיה על שם נלה וליאון בנוזיו
Cafeteriaמרצה Eyal Zoler
Department of Biomolecular Sciencesמארגן המחלקה למדעים ביומולקולרייםצרו קשר פרטים נוספים Show full text description of Host: Gideon Schreiber...» Host: Gideon Schreiber -
Date:28שלישימאי 2024הרצאה
How to Enhance Sex Determination?
More information שעה 14:00 - 15:00מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Dr. Nitzan Gonen
The Mina and Everard Goodman Faculty of Life Sciences Institute of Nanotechnology and Advanced Materials, Bar-Ilan Universityמארגן המחלקה לביולוגיה מבנית וכימיתצרו קשר -
Date:29רביעימאי 2024הרצאה
Phd Defense Seminar- Hagar Fox
More information שעה 09:30כותרת Unravelling key genes involved in carbohydrate regulation and dynamics in trees, and the link to tree performance under drought stressמיקום בניין לביוכימיה על שם נלה וליאון בנוזיו
Auditoriumמרצה Hagar Foxמארגן המחלקה למדעי הצמח והסביבהצרו קשר