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April 01, 2015
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Date:01TuesdayApril 2025Cultural Events
Sela Jazz Bar #4 From East to West I Turkiz Ensemble
More information Time 21:00 - 22:15Location Michael Sela AuditoriumHomepage Contact -
Date:02WednesdayApril 2025Lecture
students seminar series- Azrieli
More information Time 10:30 - 12:30Location Camelia Botnar BuildingContact -
Date:02WednesdayApril 2025Lecture
Life Sciences Luncheon
More information Time 12:30 - 14:00Title Prof. Ziv ShulmanLocation Nella and Leon Benoziyo Building for Biological Sciences
AuditoriumLecturer Prof. Ziv Shulman
Antibody evolution in cancerContact -
Date:03ThursdayApril 2025Cultural Events
אירוע התנדבות מכוני
More information Time 09:00 - 13:00Location מחוץ למכוןContact -
Date:03ThursdayApril 2025Lecture
Bioinformatics Unit at LSCF: Recent highlights, Single-Cell Insights, and AI Solutions for bioimaging
More information Time 09:00 - 10:00Location Candiotty AuditoriumLecturer Dr. Dena Leshkowitz, Dr. Ido Azuri Organizer Department of Life Sciences Core Facilities -
Date:03ThursdayApril 2025Colloquia
Physics Colloquium
More information Time 11:15 - 12:30Title Hunting Black Holes in our GalaxyLocation Physics Weissman AuditoriumLecturer Prof. Hans-Walter Rix
Max Planck Institute for Astronomy in HeidelbergOrganizer Department of Particle Physics and AstrophysicsAbstract Show full text abstract about Stellar evolution makes us believe that we have over 10 mill...» Stellar evolution makes us believe that we have over 10 million stellar-mass black holes (BH) in our own Galaxy, whose total mass should far exceed the mass of the central black hole. For half a century we have known that stellar-mass BHs exist, from the few dozen X-ray binaries, where tidally torn material from a very close stellar companions accretes onto the black hole and makes it shine? But is there actually this vast population of dormant BHs, either in wide binaries with a normal star or just free floating? The hunt for these BHs is now on, using ESA’s Gaia mission and other facilities: we have now detected the first dormant BHs in binary systems, after some spectacular earlier misidentification of BH impostors. And, there is first direct evidence for free-floating BHs by means of microlensing. These first discoveries already pose interesting puzzles about how these BH systems could have formed. The next few years offer spectacular prospects of finding far more dormant BHs, whether they are free-floating or in binaries, which should teach us how and when stellar-mass black holes form. -
Date:03ThursdayApril 2025Lecture
Vision and AI
More information Time 12:15 - 13:15Title Can this Model Also Recognize Dogs? Zero-Shot Model Search from WeightsLocation Jacob Ziskind Building
Room 1 - 1 חדרLecturer Jonathan Kahana
The Hebrew University of JerusalemOrganizer Department of Computer Science and Applied MathematicsContact Abstract Show full text abstract about While neural networks revolutionized fields like computer vi...» While neural networks revolutionized fields like computer vision and natural language processing, training them is time consuming and computationally demanding. Now, imagine that instead of training, one could simply search online for the most accurate model for their specific task and use it directly. With more than 1.5 million public models available on HuggingFace, this is becoming feasible. However, retrieving the right model for each task is non-trivial, and the key technical challenge is designing meaningful representations of models themselves. To address this, we introduce ProbeLog, a probing-based approach for representing classification models from their weights. Then, by projecting CLIP text embeddings into this representation space we can enable zero-shot model retrieval.
Bio:
Jonathan is a Computer Science PhD student at The Hebrew University of Jerusalem, under the supervision of Prof. Yedid Hoshen. Currently, He is working on weight space learning, aiming to understand what information can be extracted from pre-trained neural networks. His recent research can be viewed at https://pages.cs.huji.ac.il/jonkahana. -
Date:03ThursdayApril 2025Lecture
Geometric Functional Analysis and Probability Seminar
More information Time 13:30 - 14:30Title The Campaign model and dynamical noise sensitivityLocation Jacob Ziskind Building
Room 155 - חדר 155Lecturer Guy Blachar
WISOrganizer Department of MathematicsContact Abstract Show full text abstract about We study opinion dynamics on finite graphs. One of the class...» We study opinion dynamics on finite graphs. One of the classical examples is the voter model, in which each vertex is given some initial opinion, and opinions evolve with time by interactions between neighbouring vertices in which one side convinces the other. It is not hard to see that on a finite graph, the system will eventually reach a consensus, which can be seen as the output of this system.
In this talk we will introduce a new opinion dynamics model, which we call the Campaign model. In this model vertices interact as in the voter model but for a limited amount of time T ("the campaign"), and then a majority vote is taken ("elections"). The behaviour of this model depends on some geometric properties of the underlying graph.
We will discuss the behaviour of the Campaign model, and in particular ask at which times T the system loses correlation to the majority of the initial opinions. Next, we will study the dynamical noise sensitivity of the model, and ask when it exhibits a non-trivial threshold when noising the dynamics.
This is a joint work in progress with Gideon Amir, Omer Angel and Omri Marcus. -
Date:03ThursdayApril 2025Lecture
The Nexus of Genome Stability, Cancer, Senescence, and Aging: New Insights, New Players
More information Time 14:00 - 15:00Location Max and Lillian Candiotty Building
AuditoriumLecturer Prof. Yosef Shilo Organizer Moross Integrated Cancer Center (MICC) -
Date:06SundayApril 2025Conference
Mind the Science in Honor of Nir Friedman
More information Time 08:30 - 17:30Title Mind the Science in Honor of Nir FriedmanLocation The David Lopatie Conference CentreChairperson Steffen JungHomepage Contact -
Date:06SundayApril 2025Lecture
MIND THE SCIENCE II in memory of Nir Friedman
More information Time 09:15 - 16:55Location The David Lopatie Conference Centre
Conference CentreHomepage Contact -
Date:06SundayApril 2025Lecture
Department of Molecular Genetics Student Seminars 2024-25
More information Time 13:00 - 13:30Title Unraveling the molecular and structural mechanisms of zebrafish chromatophore plasticityLocation Botnar auditoriumLecturer Yael Noy -
Date:06SundayApril 2025Lecture
Department of Molecular Genetics Student Seminars 2024-25
More information Time 13:30 - 14:00Title Transgene-Free Generation of Post-Gastrulation Mouse Whole Embryo Models Derived Solely from Naïve ESCsLocation Botnar auditoriumLecturer Gulben Gurhan-Sevinc -
Date:07MondayApril 2025Colloquia
Sustainable (Solar) Energy and Electronics need Sustainable Materials
More information Time 11:00 - 12:15Location Gerhard M.J. Schmidt Lecture HallLecturer Prof. David Cahen Homepage Abstract Show full text abstract about To reach real sustainability for today’s preferred ‘sustaina...» To reach real sustainability for today’s preferred ‘sustainable’ types of energy, viz. electrical ones as solar (photovoltaic, PV, & wind; thermal solar & hydroelectric, which also store) and chemical ones as reduced CO2 [food], H2 & batteries, also the enabling materials need to be sustainable. Alas, mostly they are not, and that is a problem. As sustainability implies long life spans, it is thought to be incompatible with modern society’s pillars of continuing growth & consumerism. This is a serious issue that, while outside the scope of this lecture, adds to the science & technology challenge to return to repairable devices, and repair-friendly designs, with as best option self-healing,** the most relevant option for micro- and macro-electronic device materials. The sustainable materials challenge is reminiscent of the sustainable energy one, i.e., we need to go from science fiction to reality. Starting with bio-solar conversion, via ionics and organic material self-healing, we get to inorganic light ßà electricity conversion compounds. Emphasis will be on PV materials, as in hindsight those already provide (confirm) some material self-healing criteria. Once (many) more experimental properties data will become available (& accessible), deep learning may guide further discovery. -
Date:07MondayApril 2025Lecture
Foundations of Computer Science Seminar
More information Time 11:15 - 12:15Title Analytic Insights into the Zig-Zag Product and Its FriendsLocation Jacob Ziskind Building
Room 1 - 1 חדרLecturer Gil Cohen
Tel Aviv UniversityOrganizer Department of Computer Science and Applied MathematicsContact Abstract Show full text abstract about The well-known Zig-Zag product and related graph operators, ...» The well-known Zig-Zag product and related graph operators, like derandomized squaring, are fundamentally combinatorial in nature. Classical bounds on their behavior often rely on a mix of combinatorics and linear algebra. However, these traditional bounds are not tight and frequently fail to align with experimental results. In this talk, we will present a more refined analysis that utilizes the full spectrum of the graph, rather than relying solely on its spectral expansion. This approach produces results that both match experimental observations and, in a sense, are proved to be optimal. Our technique is analytic, diverging from classical methods: for the upper bound, we apply finite free probability, while for the lower bound, we draw on results from analytic combinatorics.
Based on joint works with Itay Cohen, Gal Maor and Yuval Peled. No prior knowledge is required. -
Date:07MondayApril 2025Lecture
Midrasha on Groups Seminar
More information Time 11:15 - 13:00Title Property (T) and it's relation to lattices, expanders, and the Ruziewicz problem for n ≥ 4: Part 2Location Elaine and Bram Goldsmith Building for Mathematics and Computer Sciences
Room 208 - חדר 208Lecturer Tomer Konforty
TAUOrganizer Department of MathematicsContact Abstract Show full text abstract about This is the second of a two-part talk covering pages 19–30 o...» This is the second of a two-part talk covering pages 19–30 of [Lub] -
Date:07MondayApril 2025Lecture
Midrasha on Groups Seminar
More information Time 14:15 - 16:00Title Faithful invariant random subgroups in acylindrically hyperbolic groupsLocation Jacob Ziskind Building
Room 1 - 1 חדרLecturer Yair Glasner
BGUOrganizer Department of MathematicsContact Abstract Show full text abstract about I will show that every acylindrically hyperbolic group Γ adm...» I will show that every acylindrically hyperbolic group Γ admits a weakly mixing probability measure preserving action which is faithful but not essentially free. In other words, Γ admits a weakly mixing nontrivial faithful IRS. I will also show that every hyperbolic group admits a characteristic random subgroup with the same properties. Both results rely on works of Sun and Kechris–Quorning.
This is a joint work with Anton Hase. -
Date:07MondayApril 2025Cultural Events
Halisa | Sophie Artus
More information Time 20:00 - 21:45Location Michael Sela AuditoriumHomepage Contact -
Date:09WednesdayApril 2025Colloquia
Immunology and Regenerative Biology Colloquium
More information Time 11:00 - 12:00Title Extremotolerance - Life at the EdgeLocation Max and Lillian Candiotty Building
AuditoriumLecturer Prof. Alwin Köhler Organizer Department of Immunology and Regenerative BiologyContact -
Date:10ThursdayApril 2025Lecture
Vision and AI
More information Time 12:15 - 13:15Title From Pixels to Motion: A Journey Towards Foundational Video ModelsLocation Jacob Ziskind Building
Room 1 - 1 חדרLecturer Hila Chefer
Tel Aviv UniversityOrganizer Department of Computer Science and Applied MathematicsContact Abstract Show full text abstract about Recent advancements in visual content generation have made i...» Recent advancements in visual content generation have made it easier than ever to generate remarkable imagery, often limited only by one’s imagination. However, unlike images, video generation requires both spatial and, critically, temporal understanding, posing unique and exciting challenges for existing models.
In this talk, I will explore key milestones in achieving coherent video generation through the lens of my works in the field. Each work tackles a different aspect of video generation, from temporal aliasing to video customization and motion comprehension. For each, I will first analyze prior approaches and identify key failure modes that lead to spatial or temporal incoherence. I will then present solutions based on the analyses to mitigate these issues—without requiring any additional data or model scaling. Finally, I will discuss open challenges and propose directions for future research.
Bio:
Hila is a PhD candidate at Tel Aviv University, advised by Prof. Lior Wolf. Her research focuses on understanding, interpreting, and correcting the predictions of deep foundational models. During her PhD, she interned at Google Research, Google DeepMind, and Meta AI, where she worked on video generation. Hila has received several awards, including the Fulbright Postdoctoral Fellowship, the Eric and Wendy Schmidt Postdoctoral Award, the Deutsch Prize for Outstanding PhD Students, and the Council for Higher Education (VATAT) Award for Outstanding PhD Students.