Random July 2015

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13 participants
16 discussions

Avviso di seminario :: Maggioni@DSS (Scienze Statistiche, Sapienza)
by Pierpaolo Brutti 15 Jul '15

15 Jul '15

----------------------------------------------------------------------------- A v v i s o d i S e m i n a r i o ----------------------------------------------------------------------------- Martedì 21 Luglio, ore 11:30am ----------------------------------------------------------------------------- Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma MAURO MAGGIONI (Duke University, Department of Mathematics) terrà un seminario dal titolo MULTISCALE GEOMETRIC METHODS FOR STATISTICAL LEARNING AND DATA IN HIGH-DIMENSIONS tutti gli interessati sono invitati a partecipare. ----------------------------------------------------------------------------- Maggiori informazioni sui seminari presso il DSS sono consultabili a quest'indirizzo: http://goo.gl/Y6OQYm Saluti Pierpaolo Brutti --- ABSTRACT We discuss a family of ideas, algorithms, and results for analyzing various new and classical problems in the analysis of high-dimensional data sets. These methods rely on the idea of performing suitable multiscale geometric decompositions of the data, and exploiting such a decomposition to perform a variety of tasks in signal processing and statistical learning. In particular, we discuss the problem of dictionary learning, where one is interested in constructing, given a training set of signals, a set of vectors (dictionary) such that the signals admit a sparse representation in terms of the dictionary vectors. We discuss a multiscale geometric construction of such dictionaries, its computational cost and online versions, and finite sample guarantees on its quality. We then generalize part of this construction to other tasks, such as learning an estimator for the probability measure generating the data, again with fast algorithms with finite sample guarantees, and for learning certain types of stochastic dynamical system in high-dimensions. Applications to construction of multi-resolution dictionaries for images, with the incorporation of invariances, will be discussed. -- ___________________________________________ INVESTI SUL FUTURO, FAI CRESCERE L’UNIVERSITÀ: *DONA IL 5 PER MILLE ALLA SAPIENZA* CODICE FISCALE *80209930587*

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Marie Skłodowska-Curie Ph.D. studentship in Statistical Sciences at the University of Padua - Italy
by Patrizia Piacentini - PhD 13 Jul '15

13 Jul '15

As a partner of the Marie Skłodowska-Curie European Innovative Training Network called "Advanced Multivariate Analysis for New Physics Searches at the Large Hadron Collider" (AMVA4NewPhysics), the University of Padua offers a PhD scholarship in Statistical Sciences. The early-stage researcher recipient of the scholarship will be enrolled in the three-year PhD program offered by the Department of Statistical Sciences. The research will focus on statistical methods targeting the analysis of data from proton-proton collisions collected by the CMS experiment at the Large Hadron Collider operating at the CERN laboratory in Geneva, Switzerland. The research plan includes the participation to international doctoral schools, workshops, and conferences, as well as visiting periods to CERN and to other European institutions belonging to the Network, plus a three-month secondment at a non-academic institution, attending to a stage centered on industry applications of Machine Learning tools. *Eligibility criteria:*Candidates should have an at least four year full time university education degree in Statistics, Mathematics, Physics or related fields formally enabling them to embark in a doctorate program in the country where the degree was obtained; in any case they should possess a strong background in Statistics and Machine Learning. Additional favorable traits include good computing skills and an interest in the application of statistical methods to fundamental research. The application of females is encouraged as AMVA4NewPhysics applies affirmative-action measures to ensure gender equality in the recruitment process. In addition to the above, at the time of recruitment by University of Padova the eligible candidates must not have resided or carried out their main activity (work, studies, etc) in Italy for more than 12 months in the period October 1, 2012 to September 30, 2015 (short stays such as holidays are not taken into account).Eligible candidates must also be, at the time of recruitment, in the first four years (full-time equivalent) of their research careers and not yet have been awarded a doctoral degree. This is measured from the date when they obtained the degree which would formally entitle them to embark on a doctorate, either in the country in which the degree was obtained or in Italy, irrespective of whether or not a doctorate is envisaged. *Conditions:*The gross scholarship amounts to 3318 euros/month; in addition, a mobility allowance of euro 600/month is provided for, as well as a family allowance of euro 500/month if applicable. The cost of the doctoral courses, as well as all expenses related to travel to schools, workshops, and network-organized events, will be sustained by the network. Call for applications is expected to open in mid August; after a preselection, the most promising candidates will be invited to a colloquium by video-conference at the beginning of October. The PhD program is expected to start at the beginning of November 2015. Further information on the position and on the program of the AMVA4NewPhysics training network can be obtained at_https://homes.stat.unipd.it/giovannamenardi/content/amva4newphysics-0_ or by contacting Dr. Giovanna Menardi at menardi AT stat DOT unipd DOT it

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Seminario di Roberto Fernandez a Roma Tre Venerdi 10 ore 12:30
by Pietro Caputo 09 Jul '15

09 Jul '15

SEMINARIO Probabilita' Roberto Fernandez University of Ultrecht Titolo: Stability of phases and perturbation and discretisation Venerdi' 10 Luglio 2015 ORE 12:30 Dipartimento di Matematica e Fisica Universita' degli Studi Roma Tre AULA 311 (SEMINARI) Largo San L. Murialdo,1

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Seminario di Probabilita' a RM1
by Fabio Spizzichino 07 Jul '15

07 Jul '15

*Mercoledì 08 luglio 2015* Ore 14:30, Aula Picone del presso il Dipartimento di Matematica dell'Universita' La Sapienza Il Dr. Arturo Erdely (Universidad Nacional Autonoma de Mexico) terra' un seminario su *Modeling complex dependence using gluing and vine copulas* Abstract Bivariate dependence may be of such complexity that no single family of known parametric copulas is able to give an acceptable goodnes of fit. The gluing copula approach may be of good help in decomposing a complex non monotone dependence into easier to model piecewise monotone dependencies. This is good news for the vine copula approach since bivariate copulas are building blocks of such approach in higher dimensions. An application to real data in economics and geophysics will be discussed. Tutte le persone interessate sono invitate ad intervenire Per informazioni: rivolgersi a Gianna Nappo (nappo(a)mat.uniroma1.it) o a Fabio Spizzichino (fabio.spizzichino(a)uniroma1.it) -- ___________________________________________ INVESTI SUL FUTURO, FAI CRESCERE L’UNIVERSITÀ: *DONA IL 5 PER MILLE ALLA SAPIENZA* CODICE FISCALE *80209930587*

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Seminario BALBI (RGS, ADAMSS, CIMAB & Matematica Applicata)
by Giacomo Aletti (giacomo.aletti) 06 Jul '15

06 Jul '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, in collaborazione col centro ADAMSS e il CIMAB, il giorno lunedì 13 Luglio 2015, alle ore 14.30, nell'Aula C del Dipartimento di Matematica dell'Universita' degli Studi di Milano, Via C. Saldini, 50, Milano, "Not just theory: the role of computational neuroscience in clinical neurophysiology" Pietro Balbi Dept. of Neurorehabilitation 'Salvatore Maugeri' Foundation Scientific Institute of Pavia, IRCCS via Boezio 28 Abstract: Neurocomputational modelling has the ultimate goal of enhancing the understanding of the behavior of neural cells and circuits. This aim is usually reached by starting from the experimental phenomena, then by postulating hypotheses or conceptual models of the biophysical events, and finally by transforming them in computational models. The conversion of experimental data in neurocomputational models takes mainly advantage of two well established mathematical theories: the cable conductor theory and the Hodgkin-Huxley equations. In this seminar the considered experimental phenomena are represented by the axon-somatic back-propagation and the recurrent discharge, which are the basis of a clinical test known as the F wave. This is a neurophysiological test commonly used to assess the motor conduction along the most proximal segments of the peripheral axons. It results from the backfiring of antidromically activated spinal motoneurons. Until recently the test has been also used as a measure of motoneuronal excitability in experimental studies. By modelling the axon-somatic back-propagation and the recurrent discharge and by showing their dependance from the biophysical properties of the transition zone between axonal initial segment (AIS) and soma of the spinal motoneurons, a clearer insight is gained about the relations between the F wave and the spinal excitability. The modelling study appears able to provide both a clearer interpretation of the electrophysiological interplay between motoneuronal regions of high morphological inhomogeneity, and a novel demonstration of the flawed role of F-wave recordings in estimating the motoneuronal excitability. ================ Per chi volesse seguire il seminario in remoto ricordo inoltre che sarà possibile avendo segnalato il proprio interessamento entro le 12 del giorno del seminario. ================= 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/.(http://rgs.mat.unimi.it/) -- ------------------------------- Giacomo Aletti, Associate Professor ADAMSS Centre (ex MIRIAM) Advanced Applied Mathematical and Statistical Sciences Department of Mathematics (www.mat.unimi.it) Via Saldini, 50 20133 Milano, Italy Tel: +39-02-503.16158 Fax:+39-02-503.16090 Cell:+39-340-9739142 **************** Per destinare il 5x1000 all'Universita' degli Studi di Milano: indicare nella dichiarazione dei redditi il codice fiscale 80012650158. http://www.unimi.it/13084.htm?utm_source=firmaMail&utm_medium=email&utm_con…

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Workshop on Gradient flows, Large deviations and Applications
by Francesco Caravenna 01 Jul '15

01 Jul '15

Ricevo e inoltro. %%%%%%%%%%%%%%%%%%% WORKSHOP ON GRADIENT FLOWS, LARGE DEVIATIONS AND APPLICATIONS Eurandom, Eindhoven (NL), November 23-24, 2015 The aim of this mini-workshop is to bring together mathematicians working on the boundary between analysis and probability. The main focus is on Gradient Flows and Large Deviations. For further details, see the website: http://www.win.tue.nl/casa/meetings/special/gradientflows/ %%%%%%%%%%%%%%%%%%%

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