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Seminario di Bernardo Nipoti a Pavia
by Carbone Raffaella 26 Mar '15

26 Mar '15

Cari colleghi, vi annuncio che martedì 31 marzo, alle ore 14 precise, nell'aula Beltrami del Dipartimento di Matematica dell'Universita' di Pavia, Bernardo Nipoti (Dipartimento di Economia e Statistica - Università di Torino) terrà un seminario dal titolo Rediscovery of Good-Turing estimators via Bayesian Nonparametrics Sunto: The problem of estimating discovery probabilities originated in the context of statistical ecology, and in recent years it has become popular due to its frequent appearance in challenging applications arising from biology, bioinformatics, genetics, linguistics, etc. A full range of statistical approaches, parametric and nonparametric as well as frequentist and Bayesian, have been proposed for estimating discovery probabilities. We investigate the relationship between the celebrated Good-Turing approach, which is a frequentist nonparametric approach developed in the 1940s, and the Bayesian nonparametric approach recently introduced in the literature. Specifically, under the assumption of a two parameter Poisson-Dirichlet prior, we show that Bayesian nonparametric estimators of discovery probabilities are asymptotically equivalent to suitably smoothed Good-Turing estimators. As a by-product of this result, we present and discuss a methodology for deriving asymptotic credible intervals to be associated to the Bayesian nonparametric estimators of discovery probabilities. Cordiali saluti, Raffaella Carbone -- Raffaella Carbone, PhD Ricercatore di Probabilità e Statistica Matematica Dipartimento di Matematica dell'Università degli Studi di Pavia

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Master of Science in Industrial and Applied Mathematics (MSIAM)
by Ester Mariucci 26 Mar '15

26 Mar '15

Buongiorno, volevo comunicare la creazione del nuovo Master of Science in Industrial and Applied Mathematics (equivalente ad una Laurea Magistrale) a Grenoble: http://msiam.imag.fr/doku.php Per gli studenti interessati, sono disponibili delle borse di studio finanziate dal labex Persyval: https://persyval-lab.org/en/education/call/master-scholarship-academic-year… Cordiali saluti, Ester Mariucci

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Seminario P. Brutti a Tor Vergata - lunedì 30 Marzo
by Claudio Durastanti 26 Mar '15

26 Mar '15

Ciclo di Seminari - Progetto ERC grant PASCAL (Probabilistic and Statistical Techniques for Cosmological Applications) Lunedì 30 marzo ore 14 - Aula Belpasso - Dipartimento di Matematica Università di Roma Tor Vergata Speaker: Pierpaolo Brutti, Università "La Sapienza" - Roma Title: Estimating the Intrinsic Dimension: The Bayesian way Abstract: In this talk I will first review some of the methods proposed for making inference on the intrinsic dimension of point cloud data sampled from a low-dimensional structure embedded in a high–dimensional ambient space, and then I will describe a Bayesian solution based on a composite likelihood built under working independence assumptions suggested by MacKay and Ghahramani. In order to get a posterior with approximately correct asymptotic behavior and curvature, I will consider some options to calibrate this pseudolikelihood and then compare in simulated and real examples a standard MCMC method against a variation of the default Bayesian framework of Ventura et al. (2013) (joint work with Alessandro Lanteri). Cordiali saluti Claudio Durastanti

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seminario all'IMATI-Milano
by Antonella Bodini 26 Mar '15

26 Mar '15

Mercoledi' 1 aprile alle ore 14 presso la sede di Milano dell'IMATI, via Bassini 15, Sala Pentagonale al secondo piano, Valérie Bélanger dell'Universita' HEC Montréal terra' un seminario dal titolo Analysis and development of real-time ambulance fleet management strategies di cui segue il sunto. Tutti gli interessati sono invitati a partecipare. ____________________________ Sunto: Emergency medical services (EMS) evolve in highly random and dynamic contexts. Indeed, the arrival of emergency calls is uncertain and varies throughout the day, forcing decision makers to adapt their decisions in response to observed changes. Two types of decisions are generally considered in real-time: dispatching and relocation. Dispatching decisions consider the selection of which ambulance to send to an emergency call. Relocation decisions consist in relocating available ambulances throughout the day in response to changes in the system state. Given the situation faced by EMS, the analysis and development of real-time management strategies to ensure a good service to the population is clearly of interest. In a first study, several ambulance relocation strategies are compared, and extensive simulation experiments are reported allowing to analyze the performance of these strategies when they face different level of system workload. Results of this study confirm the relevance of simulation methods to support decision-making in EMS stochastic environment. More importantly, they provide researchers and decisions makers with valuable insights on the use of relocation strategies, including the tradeoff between service level and personnel well-being. In a subsequent study, an innovative real-time ambulance fleet management strategy is proposed. New mathematical models and solution approaches are then developed to deal with both relocation and pre-assignment decisions. Preliminary results show that considering explicitly pre-assignment decisions, which are directly related to dispatching decisions, impact location decisions and can help better predict system performances. Cordiali saluti. -- Dott. Antonella Bodini CNR-Istituto di Matematica Applicata e Tecnologie Informatiche Via Bassini 15, 20133 Milano (Italy) tel +39 02 23699524 fax +39 02 23699538 http://www.mi.imati.cnr.it/~anto/

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No Free Lunch Seminar by Dott. Tommaso Colozza, Wed April 1 1:00 PM Aula Mancini @ SNS
by Giacomo Bormetti 26 Mar '15

26 Mar '15

Wed April 1 2015, 1:00 PM in Aula Mancini, Scuola Normale Superiore Pisa Tommaso Colozza Dipartimento di Statistica e Matematica Applicata all'Economia - Università di Pisa will deliver the seminar "Supply of public debt and demand for risk premia: a Minskian approach to credit risk" Abstract: Financial stability of EMU countries is managed by policy makers through several key macroeconomic indicators; the market instead monitors creditworthiness with credit risk premia embedded in sovereign yields. A demand-supply approach solves this duality: in a Minskian framework, positive inelastic shifts in debt-to-GDP ratio due to widespread macro-financial distress may lower risk appetites of lenders and increase risk premia, up to default. Time-variating risk appetites justify statistical relevance of debt-to-gdp variation on yields levels; if conveniently decomposed, debt velocity allows also to imply a default probability measure comparable to standard CDS-implied measures. All interested people are kindly invited. Best, Giacomo -- Giacomo Bormetti Assistant Professor of Financial Mathematics -------------------------- Faculty of Sciences Scuola Normale Superiore Pisa Piazza dei Cavalieri, 7 56126 Pisa - Italy email: giacomo.bormetti(a)sns.it http://mathfinance.sns.it/index.php/people/41-group-members/51-giacomo-borm… phone: +39 050 509248

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Summer School in Computational Econometrics
by Marco LI CALZI 26 Mar '15

26 Mar '15

-------------------------------------------------------------------- Summer School in Computational Econometrics - Programming in MatLab ===================================================================== The XII edition of the Summer School in "Computational Macroeconometrics - Programming in MatLab" will be held at the "Dipartimento di Scienze dell'Economia" of the University of Salento (Lecce, Italy) from July 27 to July 31, 2015. The main aim of this 30 hours course is to provide an introduction to applied macroeconomics and macroeconometrics with MATLAB. Lecturer: Prof. Dr. Ulrich Woitek, Department of Economics, University of Zurich. (deadline for application: 30 June 2015) For details visit: http://www.seec.unisalento.it ----------------------------------------------------------------------

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StaTalk on Biostatistics - final remind
by Francesca Ieva 25 Mar '15

25 Mar '15

Dear all, this is the last call for registrations to the first StaTalk promoted by the young section of Italian Statistical Society (y-SIS), to be held in **Milan (Italy) on April 24th, 2015** *STATALK ON BIOSTATISTICS* https://sites.google.com/site/youngsocietaitalianastatistica/events/statalk… Department of Mathematics "F. Enriques", Università degli Studi di Milano, via Saldini 50, Milano (Italy) All the information, including the program and the sign-up link for the conference, can be found on the conference website. Statalks are a series of one-day workshop aimed at early career statisticians, i.e., master degree students, people carrying out a PhD, post-docs and young researchers. StaTalks are a fantastic opportunity to share knowledge on advanced topics of statistics. The hosting research group will propose tutorials, seminars and interactive round tables on the main fields of research and application it is concerned. Participants can contribute bringing their own experience through presentations, ideas, poster and material to be shared in the debate. Registrations to the first StaTalk are still opened. *No conference fees are due, but registration is mandatory, by April 10th*, using the form available on the website. For further information or any doubt and question, please visit the website https://sites.google.com/site/youngsocietaitalianastatistica/home Best Regards Francesca Ieva -- Francesca Ieva Department of Mathematics Università degli Studi di Milano, via Saldini 50, 20133 Milano web: https://sites.google.com/site/mypagefi mail to: francesca.ieva(a)unimi.it

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Seminario ANTONIETTI (RGS & Matematica Applicata)
by Giacomo Aletti 24 Mar '15

24 Mar '15

Con preghiera di diffusione tra tutti i possibili interessati, scusandomi per invii multipli. Cordialmente, Giacomo Aletti -------------- Nell'ambito dei Reading Group Seminars e del Seminario di Matematica Applicata, il giorno lunedì 19 Gennaio 2015, alle ore 14.30, nell'Aula C del Dipartimento di Matematica dell'Universita' degli Studi di Milano, Via C. Saldini, 50, Milano, "Testing spiking neural network cerebellar model in closed-loop: three neurorobotic paradigms" Alberto ANTONIETTI Neuroengineering and medical robotics lab., Politecnico di Milano, ABSTRACT: The cerebellum is involved in a large number of different neural processes, especially in associative learning and in fine motor control. To develop a comprehensive theory of sensorimotor learning and control, it is crucial to determine the neural basis of coding and plasticity embedded into the cerebellar neural circuit and how they are translated into behavioral outcomes in learning paradigms. Learning has to be inferred from the interaction of an embodied system with its real environment, and the same cerebellar principles derived from cell physiology have to be able to drive a variety of tasks of different nature, calling for complex timing and movement patterns. We have coupled a realistic cerebellar spiking neural network with a real robot and challenged it in multiple diverse sensorimotor tasks. Adaptive motor control protocols with acquisition and extinction phases have been designed and tested, including an associative Pavlovian task (Eye blinking classical conditioning), a vestibulo-ocular task and a perturbed arm reaching task operating in closed-loop. A bidirectional long-term plasticity rule implemented at parallel fibers-Purkinje cell synapses modulated the output activity in the deep cerebellar nuclei. In all tasks, the neurorobot learned to adjust timing and gain of the motor responses by tuning its output discharge. It succeeded in reproducing how human biological systems acquire, extinguish and express knowledge of a noisy and changing world. ================= Reading Group Seminars: The Reading Group Seminars (RGS) are organized within an open community of researchers interested in applying up to date mathematical modeling and data analysis approaches to the study of biological systems. The RGS take place at the Math. Department in Milan (via Saldini). Initiatives and updates are published on the website: http://rgs.mat.unimi.it/. -- ------------------------------- Giacomo Aletti, Associate Professor ADAMSS Centre (ex MIRIAM) Advanced Applied Mathematical and Statistical Sciences Department of Mathematics (www.matematica.unimi.it) Via Saldini, 50 20133 Milano, Italy Tel: +39-02-503.16158 Fax:+39-02-503.16090 Cell: +39-340-9739142

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4th Stochastic Geometry Days in Poitiers, August 26-28, 2015 + Introd. Lectures August 24-26, 2015
by Pierre-Yves Louis 22 Mar '15

22 Mar '15

Dear colleagues, We are pleased to announce that the 4th Stochastic Geometry Days organized by the French research group GeoSto will take place in Poitiers from August 26th to August 28th, 2015. The conference will be preceded by two introductory lectures for PhD and post-doc students from August 24th to August 26th. Registration is open until May 31st. For more information, you can visit the website http://www-math.sp2mi.univ-poitiers.fr/GeoSto2015/

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Schwartzman & Cheng - 25 MARZO - TOR VERGATA - CICLO SEMINARI PASCAL
by Valentina Cammarota 20 Mar '15

20 Mar '15

Ciclo di Seminari - Progetto ERC grant PASCAL (Probabilistic and Statistical Techniques for Cosmological Applications) Mercoledi` 25 marzo ore 14 - 16 Aula D'Antoni 1101 Dipartimento di Matematica Università di Roma Tor Vergata Speakers: Armin Schwartzman & Dang Cheng Department of Statistics, North Carolina State University Title: Distribution of the Height of Local Maxima of Gaussian Random Fields Abstract: Let {f(t): t \in T} be a smooth Gaussian random field over a parameter space T, where T may be a subset of Euclidean space or, more generally, a Riemannian manifold. We provide a general formula for the distribution of the height of a local maximum P { f(t_0)>u | t_0 is a local maximum of f(t) } when f is non-stationary. Moreover, we establish asymptotic approximations for the overshoot distribution of a local maximum P { f(t_0)>u+v | t_0 is a local maximum of f(t) and f(t_0)>v } as v \to \infty. Assuming further that f is isotropic, we apply techniques from random matrices theory related to the Gaussian orthogonal ensemble to compute such conditional probabilities explicitly when T is Euclidean or a sphere of arbitrary dimension. Such calculations are motivated by the statistical problem of detecting peaks in the presence of smooth Gaussian noise. Tutti gli interessati sono invitati a partecipare. ................................................................................ Valentina Cammarota, Postdoc Department of Mathematics Universita` degli Studi di Roma Tor Vergata https://sites.google.com/site/valentinacammarota/ ................................................................................ -- Open WebMail Project (http://openwebmail.org)

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