| Sunday 19 January 2025 | |
| Events for day: Thursday 30 November 2023 |
| 10:00 - 12:30 Weekly Seminar Learning Bayesian Networks Structure with Continuous Variables School BIOLOGICAL SCIENCES One of the major challenges in modern day statistics is to formulate models and develop inferential procedures to understand the complex multivariate relationships present in high-dimensional datasets. We address the issue of model determination for DAGs, with respect to a given ordering of the variables, together with the corresponding parameter estimation. For this, we use a hierarchical mixture prior and develop a Gibbs sampling algorithm to carry out the posterior computations. We focus on the Gaussian DAG models and calculate the posterior probability of being the edge between two nodes. We then extend our idea to construct a DAG for dis ... 11:00 - 12:30 Lecture Ehrenfeucht-Fraïssé Games in the Uncountable Environment: Where is the Scott Watershed? School MATHEMATICS The Ehrenfeucht-Fraïssé games and their variants are a natural game-theoretic tool for investigating the similarity and dissimilarity between two mathematical structures. Although the study of these games is quite different in finite and infinite model theory, one might ask: if not all natural numbers are equal, why should all infinities be equal? In fact, it is within the framework of countably infinite model theory, not infinite model theory, that these games are often successful! Even at the level of the first uncountable cardinal, the picture is very mixed, but this is not surprising: The Sikorski extension theorem vs. non-trivial forcin ... 11:00 - 12:00 Theory weekly seminar (TWS) Neutrino Non-Standard Interactions (NSI) School PARTICLES AND ACCELERATORS Abstract: After a short review of possible impact of vector neutral current NSI on the neutrino oscillation patterns, I present a class of models based on a $U(1)$ gauge symmetry with a gauge boson of mass $sim 10$ MeV that lead to vector neutral current NSI with sizable couplings. I will then discuss how Coherent Elastic neutrino Nucleus Scattering (CEnuNS) experiments can test these models. In the end, I will focus on the axial neutral current NSI and show how the DUNE experiment will be able to constrain its couplings. Meeting Place: Seminar Room, School of Par ... |