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X-ORIGINAL-URL:https://web-f1.ijs.si
X-WR-CALDESC:Events for Department of Theoretical Physics
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TZID:Europe/Ljubljana
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
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TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20251106T110000
DTEND;TZID=Europe/Ljubljana:20251106T120000
DTSTAMP:20260422T063437
CREATED:20251030T152731Z
LAST-MODIFIED:20251106T105808Z
UID:77313-1762426800-1762430400@web-f1.ijs.si
SUMMARY:Michele Tammaro: Transport equation for Ultra-High Energy neutrino events
DESCRIPTION:We develop a first-principles formalism\, based on the transport equation in the line-of-sight approximation\, to link the expected number of muons at neutrino telescopes to the flux of neutrinos at the Earth’s surface. We compute the distribution of muons inside Earth\, arising from the up-scattering of neutrinos close to the detector\, as well as from the decay of taus produced farther away. This framework allows a fast semi-analytical calculation of the expected number of events\, accounting for systematic uncertainties\, as well as clarifying the assumptions behind definitions commonly used in the literature. As a working case\, we apply this formalism to analyze the high-energy muon event recorded by KM3NeT\, with a reconstructed energy of approximately 120 PeV\, in comparison with the non-observation of similar events by IceCube. We derive the tension between the two experiments under different assumptions for the neutrino flux\, correcting previous results found in literature. Finally\, the formalism can be easily extended to include other type of events\, furthermore allowing one to treat potential beyond-the-Standard-Model sources of muons.\nhttps://indico.ijs.si/event/3286/
URL:https://web-f1.ijs.si/event/michele-tammaro-transport-equation-for-ultra-high-energy-neutrino-events/
LOCATION:F1 tea room
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20251106T140000
DTEND;TZID=Europe/Ljubljana:20251106T150000
DTSTAMP:20260422T063437
CREATED:20251002T094353Z
LAST-MODIFIED:20251106T134334Z
UID:74448-1762437600-1762441200@web-f1.ijs.si
SUMMARY:Lovro Lotrič\, "Effect of curvature on surface tension"
DESCRIPTION:https://indico.ijs.si/event/3104/
URL:https://web-f1.ijs.si/event/lovro-lotric-the-tolman-length/
LOCATION:C/2-X – F1 čajnica (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20251113T140000
DTEND;TZID=Europe/Ljubljana:20251113T150000
DTSTAMP:20260422T063437
CREATED:20251002T094353Z
LAST-MODIFIED:20251112T165846Z
UID:74449-1763042400-1763046000@web-f1.ijs.si
SUMMARY:Vid Pograjc\, "Computational Chemistry of L-DOPA\, Phenol/Catechol\, and Ammonia: My Past Research"
DESCRIPTION:https://indico.ijs.si/event/3105/
URL:https://web-f1.ijs.si/event/jan-rozman-tba-2/
LOCATION:A/1-106 – Seminarska soba fizike (F5) (Jamova)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20251120T140000
DTEND;TZID=Europe/Ljubljana:20251120T150000
DTSTAMP:20260422T063437
CREATED:20251002T094353Z
LAST-MODIFIED:20251112T165846Z
UID:74450-1763647200-1763650800@web-f1.ijs.si
SUMMARY:Primož Ziherl (TBA)
DESCRIPTION:https://indico.ijs.si/event/3106/
URL:https://web-f1.ijs.si/event/primoz-ziherl-tba/
LOCATION:A/1-106 – Seminarska soba fizike (F5) (Jamova)
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BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20251125T110000
DTEND;TZID=Europe/Ljubljana:20251125T120000
DTSTAMP:20260422T063437
CREATED:20251118T134311Z
LAST-MODIFIED:20251125T105955Z
UID:79161-1764068400-1764072000@web-f1.ijs.si
SUMMARY:Ilia Musco: New perspectives on primordial black holes
DESCRIPTION:The possibility of primordial black holes (PBHs) forming in the early Universe from the collapse of cosmological perturbations has received lots of attention in the last ten years after the first detection of gravitational waves. PBHs span a very wade range of masses\, from the particle size\, interesting as dark mater candidate\, to the solar mass range contributing to LVK signals\, to the seeds of supermassive black holes\, explaining the formation of high redshift AGN. In this talk I will explain the mechanism of PBH formation using numerical simulations starting from cosmological initial conditions\, discussing the possible cosmological impact\, and the open issues related to non linear aspects of the problem. \nhttps://indico.ijs.si/event/3334/
URL:https://web-f1.ijs.si/event/ilia-musco-new-perspectives-on-primordial-black-holes/
LOCATION:Room 2.04 (FMF\, Math building)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20251127T110000
DTEND;TZID=Europe/Ljubljana:20251127T120000
DTSTAMP:20260422T063437
CREATED:20251110T154305Z
LAST-MODIFIED:20251127T104230Z
UID:78427-1764241200-1764244800@web-f1.ijs.si
SUMMARY:Patrick Stengel: Nuclear recoil detection with color centers in bulk lithium fluoride
DESCRIPTION:We present initial results on nuclear recoil detection based on the fluorescence of color centers created by nuclear recoils in lithium fluoride. We use gamma rays\, fast and thermal neutrons\, and study the difference in responses they induce\, showing that this type of detector is rather insensitive to gamma rays. We use light-sheet fluorescence microscopy to image nuclear recoil tracks from fast and thermal neutron interactions deep inside a cubic-centimeter sized crystal and demonstrate automated feature extraction in three dimensions using machine learning tools. The number\, size\, and topology of the events agree with expectations based on simulations with TRIM. These results constitute the first step towards 10-1000g scale detectors with single-event sensitivity for applications such as the detection of dark matter particles\, reactor neutrinos\, and neutrons.\nhttps://indico.ijs.si/event/3293/
URL:https://web-f1.ijs.si/event/patrick-stengel/
LOCATION:A/1-106 – Seminarska soba fizike (F5)
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Ljubljana:20251127T141500
DTEND;TZID=Europe/Ljubljana:20251127T151500
DTSTAMP:20260422T063437
CREATED:20251103T142728Z
LAST-MODIFIED:20251112T165846Z
UID:77716-1764252900-1764256500@web-f1.ijs.si
SUMMARY:Miroslav Vořechovský\, "Model for Mechanistic Coupling of Patterning and Proliferation in Organoids by a 3D Vertex Model"
DESCRIPTION:A three-dimensional computational model inspired by the work Okuda and his collaborators \, is developed to reveal the interaction between patterning and proliferation in epithelial tissue. The geometrical representation is based on Voronoi cells representing individual cells and differentiating the lateral\, apical an basal cell faces. The viscous-damped system of forces controlling the shape of the multicellular tissue is derived from a potential featuring both volumetric and surface terms. Equipped with the cell rearrangements via cell-neighbor exchanges\, the model allows for cell division and splitting while following the cell cycles.Fig. 1 Cell division during pattern-driven growth from initial single-layered spherical organoid.Pattering is controlled by the interplay of two morphogens (activator and inhibitor) in a reaction-diffusion system . The formation of patterns controls the cell proliferation in which the local concentration of activator which plays a role of a mitogen. The cell growth rate is modelled via Hill equation in which the exponent plays a central role in the presented coupling between patterning and proliferation.The developed model is used to decipher the diverse roles of ERK and Akt signaling in organoid morphogenesis by matching the laboratory data. In our computational model of multicellular organoid growth\, we have identified a feedback loop between the formation of patterns\, influencing the rate of cell proliferation and consequently the tissue mass increase. This feedback loop critically impacts the subsequent patterning through a diffusive-reaction system of morphogens. The interplay between proliferation and patterning accurately captures experimentally observed variations in the shapes of growing mammary gland organoids in the presence of two types of FGF: WT and Stab. The integration of the model with laboratory data and its biological interpretation are presented in a complementary contribution.REFERENCES Okuda\, S.\, Inoue\, Y. & Adachi\, T. Three-dimensional vertex model for simulating multicellular morphogenesis. Biophysics and Physicobiology 12\, (2015) 13–20. doi:10.2142/biophysico.12.0_13 Gierer\, A. & Meinhardt\, H. A theory of biological pattern formation. Kybernetik 12\, (1972) 30–39. doi:10.1007/bf00289234Acknowledgement: Czech Science Foundation project no. GA23-04974S.\nhttps://indico.ijs.si/event/3289/
URL:https://web-f1.ijs.si/event/miroslav-vorechovsky-a-3d-vertex-model-for-mechanistic-coupling-of-patterning-and-proliferation-in-organoids/
LOCATION:Seminar room of physics (106) (IJS)
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