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ינואר 01, 2015
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Date:23ראשוןמרץ 2025אירועי תרבות
הקאמרטה הישראלית ירושלים | תהילתו של מולייר
More information שעה 20:00 - 22:00מיקום אודיטוריום מיכאל סלעדף בית צרו קשר -
Date:24שנימרץ 2025הרצאה
Foundations of Computer Science Seminar
More information שעה 11:15 - 12:15כותרת Privacy amplification by random allocation (is approximately Poisson subsampling)מיקום בניין יעקב זיסקינד
Room 1 - 1 חדרמרצה Moshe Shenfeld
Hebrew University of Jerusalemמארגן המחלקה למדעי המחשב ומתמטיקה שימושיתצרו קשר תקציר Show full text abstract about Given two distributions P, Q and an integer t, we analyze tw...» Given two distributions P, Q and an integer t, we analyze two sampling processes. In "random allocation," we first sample an index i uniformly from [t], then draw r_{i} ~ P and r_{j} ~ Q for all other j in [t]. In "Poisson sampling," we independently draw r_{i} ~ 1/t*P + (1-1/t)*Q for each i in [t]. We bound the difference between these processes' output distributions and the baseline of sampling r_{i} ~ Q for all i.
This theoretical result provides key insights for analyzing DP-SGD, a privacy-preserving variant of stochastic gradient descent. While Poisson subsampling has well-understood privacy guarantees, common implementations use element shuffling, which was recently shown to have larger privacy losses in certain regimes. Random allocation offers a middle ground, and we prove its privacy analysis reduces to comparing the distributions described above.
We show that these variants' privacy guarantees are within a constant factor of each other across all parameter regimes and converge asymptotically in t. Our proof has two key components: decomposing Poisson sampling into a mixture of random allocation processes, and showing that random allocation can be viewed as a modified Poisson process where sampling probabilities depend on previous outputs.
Joint work with Vitaly Feldman -
Date:24שנימרץ 2025אירועים אקדמיים
PhD Defense- Melina Shamshoon ZOOM ONLY
More information שעה 17:00 - 18:00כותרת Assessment of Enzymes Involved in Cotton (Gossypium Hirsutum ) Cellulose Biosynthesis Using Glucose Derivativesמיקום בניין לביוכימיה על שם נלה וליאון בנוזיו למדעי הצמחמרצה Melina Shamshoon
Zoom meeting:https://us06web.zoom.us/j/82678863618?pwd=lQMH2BaIYVjqaT7aSrMkvDL0tzy0Eb.1Meeting ID: 826 7886 3618 Passcode: 603380צרו קשר -
Date:25שלישימרץ 2025הרצאה
Molecular Origami and the Hidden Rules of Protein Complex Evolution
More information שעה 14:00 - 15:00מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Dr. Saurav Malik מארגן המחלקה לביולוגיה מבנית וכימית -
Date:27חמישימרץ 2025הרצאה
Geometric Functional Analysis and Probability Seminar
More information שעה 11:00 - 12:00כותרת Boundaries of attractors of diffeomorphisms subject to a bounded diffusive noiseמיקום בניין יעקב זיסקינד
Room 1 - 1 חדרמרצה Dmitry Turaev
Imperial Collegeמארגן המחלקה למתמטיקהצרו קשר תקציר Show full text abstract about We show that the unit normal bundle of a smooth boundary of ...» We show that the unit normal bundle of a smooth boundary of an attractor for random dynamical systems of a certain natural class is a Legendrian invariant manifold of a deterministic map which preserves a contact structure. In this framework, random dynamics can be described and analyzed by purely deterministic means. -
Date:27חמישימרץ 2025סימפוזיונים
Simulating high-temperature superconductivity in a triangular moiré lattice
More information שעה 11:15 - 12:15מיקום Physics Weissman Auditoriumמרצה Prof. Kin Fai Mak
Light refreshments at 11:00מארגן המחלקה לפיזיקה של חומר מעובהתקציר Show full text abstract about Moiré materials built on transition metal dichalcogenide sem...» Moiré materials built on transition metal dichalcogenide semiconductors have emerged as a tunable platform for simulating the Hubbard model on a triangular lattice. A natural question arises: Can the platform be tuned to yield a phase diagram similar to that in high-temperature cuprate superconductors? In this talk, I will discuss the emergence of “high-temperature” superconductivity near the Mott transition in a triangular moiré lattice with intermediate coupling strength. The emergent doping-temperature phase diagram looks remarkably similar to that in cuprate superconductors. I will also discuss the evolution of the phase diagram by tuning the band structure of the material by gating. The results could provide a new angle for understanding the phenomenon of high-temperature superconductivity in strongly correlated materials. -
Date:27חמישימרץ 2025הרצאה
Regulation of immune cell function in tumor microenvironment of triple-negative breast cancer
More information שעה 14:00 - 15:00מיקום בניין ע"ש מקס ולילאן קנדיוטי
Auditoriumמרצה Prof. Idit Shachar מארגן המכון לחקר הטיפול בסרטן עש דואק -
Date:27חמישימרץ 2025הרצאה
Metabolism, Clonality and Immunotherapy: A Single-Cell PerspectiveTo be announced
More information שעה 15:00 - 16:00מיקום בניין לביוכימיה על שם נלה וליאון בנוזיו
Auditorium Rm. 191מרצה Dr. Keren Yizhak
Faculty of Medicine, Technion - Israel Institute of Technology, Haifaתקציר Show full text abstract about Understanding why some patients respond to immune checkpoint...» Understanding why some patients respond to immune checkpoint therapy while others do not remains a critical challenge in cancer research. This talk will explore three key studies that shed light on this question. First, we uncover metabolic predictors of response to checkpoint blockade therapy, revealing how tumor and immune cell metabolism shape treatment outcomes. Next, we present a single-cell meta-analysis of T cell clonal dynamics, highlighting their role in immunotherapy success. Finally, we introduce scXpand, a machine-learning approach for predicting T cell clonality from scRNA-seq, offering a novel tool to enhance immunotherapy research and precision medicine. -
Date:27חמישימרץ 2025אירועים אקדמיים
PhD defense- Eliran offer
More information שעה 15:00 - 17:00כותרת Viral and bacterial synergy in pathogenicity expedites algal bloom demiseמיקום בניין לביוכימיה על שם נלה וליאון בנוזיו למדעי הצמח
690מרצה Eliran Soffer צרו קשר -
Date:27חמישימרץ 2025הרצאה
Vision and AI
More information שעה 16:30 - 17:30כותרת Decomposing Images through Compositional Energy Functionsמרצה Yilun Du
Google Deepmind, Harvardמארגן המחלקה למדעי המחשב ומתמטיקה שימושיתצרו קשר תקציר Show full text abstract about Given a distribution of images, how can we can decompose the...» Given a distribution of images, how can we can decompose the data into a set of underlying components? In this talk, I'll present an approach that decomposes images into a underlying composable energy functions. I'll illustrate how energy functions allow us to represent both global components of an image, such as lighting as well as local components such as objects. I'll further show how we leverage pretrained vision models to infer these components. Finally, I'll illustrate how discover components can be recombined to form a variety of images substantially different than those seen at training time.
Speaker's bio:
Yilun Du is an incoming assistant professor at Harvard and is currently a senior research scientist at Google Deepmind. He received has PhD and BS from MIT and was supported by a NSF graduate fellowship. -
Date:27חמישימרץ 2025אירועי תרבות
רונה קינן בסלע
More information שעה 21:00 - 22:30מיקום אודיטוריום מיכאל סלעצרו קשר -
Date:29שבתמרץ 2025אירועי תרבות
אורח בא לדב | תיאטרון המדיטק
More information שעה 11:00 - 12:00מיקום אודיטוריום מיכאל סלעדף בית צרו קשר -
Date:30ראשוןמרץ 2025הרצאה
Special Guest Seminar - Dr. Thierry Nordmann
More information שעה 11:15 - 12:15כותרת Unraveling the Molecular Architecture of the Skin for Personalized Medicineמיקום Wolfson Auditoriumמרצה Dr. Thierry Nordmann מארגן המחלקה לביולוגיה מולקולרית של התאצרו קשר -
Date:30ראשוןמרץ 2025הרצאה
The Clore Center for Biological Physics
More information שעה 12:45 - 14:30כותרת An information content principle explains regulatory patterns of human gene expression across tissues.מיקום ספרית הפיסיקה על שם נלה וליאון בנוזיומרצה Professor Yitzhak Pilpel
Lunch at 12:45צרו קשר תקציר Show full text abstract about In my talk I will introduce a novel framework that applies a...» In my talk I will introduce a novel framework that applies a principle from information theory, that of Minimum Description Length (MDL), to understand how regulation of human gene expression across organs, tissues is shaped by regulatory architecture.Examination of expression patterns of human genes across the body reveals an intriguing duality: While many genes are expressed in only one tissue, others, known as “housekeeping genes”, are ubiquitously expressed in essentially every tissue. Yet, interestingly, a considerable portion of the genes are on the mid-range, deliberately expressed in many tissues but are also absent in many others.Intuitively, in human language terms, specifying the expression program of the genes on the two ends of the spectrum requires a short description – e.g. “expressed in all tissues”, or “expressed only in brain”. Yet specifying the expression of genes in the middle of the scale requires longer description, or a longer MDL, having to specify in each tissue if the gene is expressed or not, and at what level. We sought to measure regulatory complexity of each human gene and examine if the MDL principle predicts and explains regulatory complexity. Our findings lend support to the MDL principle’s prediction. Our measure of regulatory complexity of a gene’s expression pattern can be predicted by quantifying its regulatory information content. In the talk we shall discuss evolutionary implications to the development of multi-cellularity.FOR THE LATEST UPDATES AND CONTENT ON SOFT MATTER AND BIOLOGICAL PHYSICS AT THE WEIZMANN, VISIT OUR WEBSITE: https://www.biosoftweizmann.com/ -
Date:30ראשוןמרץ 2025הרצאה
It’s an Emergency: What It Means to Be a Scientist in an Era of Climate and Ecological Breakdown
More information שעה 13:00 - 14:00כותרת IES- Institute For Environmental Sustainability Initiative seminar series 2025-2026מיקום בניין לביוכימיה על שם נלה וליאון בנוזיו למדעי הצמח
690מרצה Dr. Avner Gross מארגן המכון לסביבה וקיימות -
Date:31שנימרץ 2025אירועים אקדמיים
Scientific Council Meeting
More information שעה 10:00 - 12:00מיקום מרכז כנסים על-שם דויד לופאטי
KIMELצרו קשר -
Date:31שנימרץ 2025סימפוזיונים
Decoding the molecular mechanism of histone modification
More information שעה 11:00 - 12:15מיקום אולם הרצאות ע"ש גרהרד שמידטמרצה Prof. Cynthia Wolberger
Department of Biophysics and Biophysical Chemistry, The Johns Hopkins Universityמארגן המחלקה לביולוגיה מבנית וכימיתדף בית צרו קשר תקציר Show full text abstract about Post-translational modifications of histones play a central ...» Post-translational modifications of histones play a central role in regulating all cellular processes requiring access to DNA. Monoubiquitinated histone H2B-K120 is a hallmark of actively transcribed genes that plays multiple roles in activating transcription, while monoubiquitinated histone H2A-K119 is abundant in heterochromatin, which is transcriptionally silent. Our structural studies have revealed how histone H2B is specifically ubiquitinated and deubiquitinated, and ubiquitinated H2B stimulates histone methylation. We have also shown how ubiquitin can regulate access to the nucleosome acidic patch, a hotspot for interactions with other chromatin-modifying enzymes. I will also discuss recent studies of a histone kinase that has an unusual mode of binding nucleosomes. -
Date:31שנימרץ 2025הרצאה
Midrasha on Groups Seminar
More information שעה 11:15 - 13:00כותרת Property (T) and it's relation to lattices, expanders, and the Ruziewicz problem for n ≥ 4: Part 1מיקום גולדסמית-מתמטיקה
Room 208 - חדר 208מרצה Saar Bader
Technionמארגן המחלקה למתמטיקהצרו קשר תקציר Show full text abstract about This is the first of a two-part talk covering pages 19–30 of...» This is the first of a two-part talk covering pages 19–30 of [Lub] -
Date:31שנימרץ 2025הרצאה
Midrasha on Groups Seminar
More information שעה 14:15 - 16:00כותרת Mixed identities in linear groups and effective versionsמיקום בניין יעקב זיסקינד
Room 1 - 1 חדרמרצה Tsachik Gelander מארגן המחלקה למתמטיקהצרו קשר תקציר Show full text abstract about A mixed identity in group G is an equation W(x)=1 where W is...» A mixed identity in group G is an equation W(x)=1 where W is a non-trivial word in the free product G∗⟨x⟩. which is satisfied for all x∈G. Mixed Identity Free (MIF) means that no such identity holds on G. When G has no mixed identities, one wishes to find such x effectively (w.r.t the word metric). Set f(n)=min { | g | : g∈G , W(g)≠1 for all W∈B(n) } where B(n) is the n-th ball in G∗⟨x⟩. If f is sub-exponential there are interesting applications for the reduced C*-algebra of the group, especially when the group also has rapid decay.
Recently, Elayavalli and Schafhauser gave a negative answer for the C*-algebraic Tarski problem by studying this property for free groups. More recently, Itamar Vigdorovich extended their work to uniform lattices in SL(n,R). What we proved is:
Theorem 1. For a f.g. linear group \Gamma with MIF, the function f is linear.
If the Zariski closure G is a classical group, then \Gamma is MIF, provided G is PSL(n), or G=SP_{2r} and \Gamma has no elements of order 2, or G=SO(n) and \Gamma has no elements g for which g+g^{-1} is a scalar. Along the way, we proved a new variant of the supper approximation theorem, which is of independent interest.
This is a joint work with Nir Avni. -
Date:01שלישיאפריל 2025הרצאה
Lior Gorodisky - PhD Thesis Defense
More information שעה 11:15 - 13:00מיקום בניין ארתור ורושל בלפר למחקר ביורפואי
Botnarתקציר Show full text abstract about Olfaction plays a crucial role in human perception, yet indi...» Olfaction plays a crucial role in human perception, yet individuals with isolated congenital anosmia (ICA) navigate the world without ever experiencing smells. I will present findings from my research investigating how ICA influences behavior, physiology, and social interaction, with a particular focus on responses to fear-related chemosignals. First, I will describe distinct respiratory patterns observed in anosmics, both in general and in response to specific social and environmental contexts. While anosmics exhibited reduced sniff modulation in response to social cues, they adapted their breathing patterns similarly to normosmics during environmental transitions, suggesting compensatory mechanisms independent of olfaction. Next, I will discuss behavioral and physiological responses to fear sweat, demonstrating that normosmics exhibit heightened emotional engagement, whereas anosmics show reversed or minimal responses. These findings emphasize the role of olfactory input in emotional contagion and align with research on sensory processing differences in other populations. Finally, I will present functional brain imaging data revealing distinct neural activation patterns in anosmics in response to fear-related cues. While anosmics lack olfactory perception, they recruit alternative neural pathways, with lateralized brain activity suggesting adaptive mechanisms for processing social and emotional information. Together, these findings provide novel insights into the interplay between olfaction, social behavior, and neural adaptation. They highlight how anosmics adjust to sensory deficits and raise important questions about the flexibility of human sensory processing.