Archive for Italia

MCMC postdoc positions at Bocconi

Posted in pictures, Statistics, Travel, University life with tags , , , , , , , , , , on January 17, 2023 by xi'an

[A call for postdoc candidates to work in Milano with Giacomo Zanella in the coming years under ERC funding. In case you are interested with a postdoctoral position with me at Paris Dauphine on multi-agent decision-making, data sharing, and fusion algorithms, do not hesitate to contact me, the official call for applications should come up soon!]

Three postdoc positions available at Bocconi University (Milan, Italy), under the supervision of Giacomo Zanella and funded by the ERC Starting Grant “Provable Scalability for high-dimensional Bayesian Learning”. Details and links to apply available online.

The deadline for application is 28/02/2023 and the planned starting date is 01/05/2023 (with some flexibility). Initial contracts are for 1 year and are extendable for further years under mutual agreement.

Candidates will conduct research on computational aspects of statistical and machine learning methods, with a particular focus on Bayesian methodologies. The research activity, both in terms of specific topic and research approach, can adapt to the profile and interests of the successful candidates. Beyond working with the supervisor and coauthors on topics related to the grant project (see here and there for more details on the research topics of the supervisor and grant project), candidates will get the chance to interact with various faculty members, postdocs and PhD students of the Stats&ML group at Bocconi (see e.g. researchers at Bocconi).

Interested candidates can write to giacomo zanella at unibocconi for more information about the positions.

All about that [Detective] Bayes [seminar]

Posted in Books, Statistics, University life with tags , , , , , , , , , , , , , , on January 5, 2023 by xi'an
On 10 January 2023, at 14:00, Campus Pierre et Marie Curie (Sorbonne Université), Room 15.16-309, an All about that Bayes seminar presentation by Daniele Durante, visiting Paris Dauphine this month:

Daniele Durante (Bocconi University) – Detective Bayes: Bayesian nonparametric stochastic block modeling of criminal networks

Europol recently defined criminal networks as a modern version of the Hydra mythological creature, with covert structure and multifaceted evolutions. Indeed, relationships data among criminals are subject to measurement errors, structured missingness patterns, and exhibit a complex combination of an unknown number of core-periphery, assortative and disassortative structures that may encode key architectures of the criminal organization. The coexistence of these noisy block patterns limits the reliability of community detection algorithms routinely-used in criminology, thereby leading to overly-simplified and possibly biased reconstructions of organized crime topologies. In this seminar, I will present a number of model-based solutions which aim at covering these gaps via a combination of stochastic block models and priors for random partitions arising from Bayesian nonparametrics. These include Gibbs-type priors, and random partition priors driven by the urn scheme of a hierarchical normalized completely random measure. Product-partition models to incorporate criminals’ attributes, and zero-inflated Poisson representations accounting for weighted edges and secrecy strategies, will be also discussed. Collapsed Gibbs samplers for posterior computation are presented, and refined strategies for estimation, prediction, uncertainty quantification and model selection will be outlined. Results are illustrated in an application to an Italian Mafia network, where the proposed models unveil a structure of the criminal organization mostly hidden to state-of-the-art alternatives routinely used in criminology. I will conclude the seminar with ideas on how to learn the evolutionary history of the criminal organization from the relationship data among its criminals via a novel combination of latent space models for network data and phylogenetic trees.

dusk from Zattere [jatp]

Posted in pictures, Travel with tags , , , , , , , , , , on February 21, 2022 by xi'an

riflessioni veneziane [jatp]

Posted in pictures, Travel with tags , , , , , , , , , , on February 18, 2022 by xi'an

clair obscur #3 [jatp]

Posted in pictures, Travel with tags , , , , , , , on February 17, 2022 by xi'an

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