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DTSTART;TZID=Europe/Paris:20260914T140000
DTEND;TZID=Europe/Paris:20260914T150000
DTSTAMP:20260910T141150Z
CREATED:20260910T141150Z
LAST-MODIFIED:20260910T141150Z
UID:10000242-1789394400-1789398000@sfp-alpes.fr
SUMMARY:Alberto CARTA ( Laboratory for Material simulations\, Paul Scherrer Institut\, Villigen)
DESCRIPTION:Of bandits and Bohr magnetons : balancing exploration and exploitation in magnetic landscapes\nRésumé : \nThe energy landscape of strongly interacting magnetic materials is a high-dimensional\, rugged terrain populated by a multitude of metastable states with distinct magnetizations\, oxidation states\, and orbital orders. Identifying the true ground state within this complexity remains a significant hurdle for the computational design of materials with tunable magnetic properties.\nBuilding on the work of Ponet et al. [1\,2]\, we systematically characterize this terrain to reveal the fundamental drivers of its complexity. We trace its origins to a core competition between the DFT functional’s preference for delocalization and the Hubbard +U correction’s drive for localization. This primary conflict is further modulated by a hierarchy of magnetic interactions\, including Hund’s coupling\, superexchange\, and Kugel-Khomskii physics\, which collectively define the energetic valleys and barriers across both high and low energy scales.\nTo overcome these barriers\, we propose a novel approach inspired by a completely different field: advertisement/recommendation engines (contextual Bandits) currently powering social media feeds and large parts of the Internet. By leveraging bandit strategies that balance the exploration of unknown configurations with the exploitation of known areas\, we demonstrate an efficient method for navigating this landscape. Our results show that these strategies successfully identify the lowest energy states where traditional methods often fail\, providing a robust framework for predicting and engineering the properties of strongly correlated magnetic materials. \n[1] Ponet\, L.\, Di Lucente\, E.\, & Marzari\, N. (2024). The energy landscape of magnetic materials. npj Computational Materials\, 10(1)\, 151.\n[2] Haddadi\, F.\, Campi\, D.\, dos Santos\, F.\, Mounet\, N.\, Ponet\, L.\, Marzari\, N.\, & Gibertini\, M. (2025). Exploring the magnetic landscape of easily-exfoliable two-dimensional materials (arXiv:2509.09531v2). \n_ \nContact : matteo.dastuto@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/alberto-carta-laboratory-for-material-simulations-paul-scherrer-institut-villigen/
LOCATION:CNRS – Salle Louis Weil (E424)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
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DTSTART;TZID=Europe/Paris:20260914T140000
DTEND;TZID=Europe/Paris:20260914T150000
DTSTAMP:20260903T152520Z
CREATED:20260903T152520Z
LAST-MODIFIED:20260903T152520Z
UID:10000237-1789394400-1789398000@sfp-alpes.fr
SUMMARY:Gabriel GARCIA JIMENEZ  (Institut Laue-Langevin)
DESCRIPTION:Proton-induced reactions on 238U in inverse kinematics : probing fission through nucleon knockout\nRésumé : \nIn this seminar\, I will present a study of proton-induced reactions on 238U in inverse kinematics\, performed at 540 AMeV with the R3B/SOFIA setup at GSI. The experiment provides access to the different reaction channels and\, in particular\, to the fission of the protactinium residue following nucleon knockout. \nI will discuss how the excitation energy of the residual nucleus was reconstructed from the kinematics of the emitted nucleons and how it can be correlated with the charge distribution of the fission fragments. This provides a way to investigate the evolution of shell effects with excitation energy and to test different theoretical descriptions of this process. The experimental results will be compared with calculations based on the INCL and ABLA07 models. \nFinally\, I will show the measured cross sections for the main spallation-evaporation and spallation-fission channels and compare them with previous experimental data and theoretical predictions. Overall\, the results provide insight into the interplay between nucleon knockout\, nuclear excitation\, and fission in relativistic proton-induced reactions on heavy nuclei. \nHenry Fischer (College 3 Secretary) \nExternal visitors may ask for a site access to : dubouloz@ill.fr \nZoom link : https://ill.zoom.us/j/7804743065?pwd=vYbib10VNk56W5mHOHB2QhzTBEyT0J.1&omn=95143035964 – Password : SeminarC3 \n 
URL:https://sfp-alpes.fr/event/gabriel-garcia-jimenez-institut-laue-langevin/
LOCATION:ILL – Salle de Séminaire (110-111)\, ILL 50 71 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260915T110000
DTEND;TZID=Europe/Paris:20260915T120000
DTSTAMP:20260910T142118Z
CREATED:20260910T142118Z
LAST-MODIFIED:20260910T142118Z
UID:10000243-1789470000-1789473600@sfp-alpes.fr
SUMMARY:Thomas KISBY (Centre for Nanotechnology in Medicine\, Manchester (UK)
DESCRIPTION:Nanoscale approaches to brain tumour therapy : harnessing biology for targeted therapeutics\nRésumé : \nGlioblastoma remains one of the most challenging cancers to treat\, in part because conventional approaches struggle to selectively access and target the cells responsible for recurrence. This talk will explore how nanoscale technologies can exploit the biology of brain tumours and the brain to create new therapeutic opportunities. Using graphene oxide\, a nanomaterial with preferential interaction with tumour-associated immune cells\, I will describe how we can use this as a locally administered platform for both more localised chemotherapy and targeted tumour immunomodulation. \nI will then discuss a new approach that exploits the biological response to tumour resection itself : a transient postoperative window in which the blood–brain barrier becomes selectively\npermeable to clinically used liposomal nanomedicines. By linking the timing and biology of surgery with nanoscale drug delivery\, we have developed an approach to specifically target residual disease at the site of recurrence. Together\, these studies illustrate how understanding and exploiting biological processes can guide the design and application of nanotherapeutics for brain cancer. \n_ \nContact : anne-laure.bulin@univ-grenoble-aleps.fr
URL:https://sfp-alpes.fr/event/thomas-kisby-centre-for-nanotechnology-in-medicine-manchester-uk/
LOCATION:IAB – Salle de séminaire\, IAB Site Santé - Allée des Alpes\, La Tronche\, 38700\, France
CATEGORIES:Séminaire
ORGANIZER;CN="IAB":MAILTO:appaixfl@univ-grenoble-alpes.fr
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