Random December 2013

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12 participants
24 discussions

Modifica orario- Seminario F. Martinelli
by alessandra bianchi 10 Dec '13

10 Dec '13

Martedi' 17 dicembre 2013 alle ore 16 presso l'aula 1BC50 del Dipartimento di Matematica di Padova il Prof. Fabio Martinelli (Dip. di Matematica, Universita' di Roma Tre) terra' il seguente seminario Title: Time scales separation and dynamical heterogeneities in the East model. Abstract: The East model is a finite linear Markov chain of 0-1 spins, evolving according to a very simple rule: i) with rate 1 and independently for each vertex, a new value 1/0 is proposed with probability 1-q and q respectively; ii) the proposed value is accepted iff the spin immediately to the left is 0. The model and its generalizations play an important role as models of the dynamics of real glasses. The parameter q, which turns out to be the density of the zeros (the facilitating spins) in the stationary measure, is assumed to be very small. In the physical literature this setting corresponds to a low temperature case. We will examine the problem of dynamic heterogeneity, i.e. non-trivial spatio-temporal fluctuations of the local relaxation to equilibrium. A key result will be a very precise computation of the relaxation time of the chain as a function of q and of its length, which uses induction on length scales on one hand and a novel algorithmic lower bound on the other. Our findings reject non rigorous approaches based on numerical simulations. We will conclude with a conjecture due to D. Aldous and P. Diaconis about the scaling limit of the East chain as q-->0. Joint work with A. Faggionato and P. Chleboun -- Alessandra Bianchi Dip. di Matematica Pura e Applicata Università di Padova Via Trieste, 63 - 35121 Padova, Italy phone: +39 049 827 14 06 fax: +39 049 827 14 28 e-mail: bianchi(a)math.unipd.it http://www.math.unipd.it/~bianchi/

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Post-Doc position in Modena
by Cristian Giardina 10 Dec '13

10 Dec '13

*---------------------------------------------------------* *1 Post-doctoral fellowship for 2014-2015* Announcement: The University of Modena and Reggio Emilia has an open call for 1 Post-doctoral position (1+1 year) funded by the Italian Ministry of Education and Research in the framework of the FIRB project “Stochastic processes in interacting particle systems: duality, metastability and applications” (www.stochastics.unimore.it/firb). Short description: The candidate is expected to work on interacting particle systems, with emphasis on non-equilibrium processes and population dynamics, including their algorithmic aspects. Specific research topics include Markov stochastic processes (both diffusions and jump processes) and large deviations theory. The aim is to develop probabilistic tools, such as duality theory, for the analysis of stochastic processes in the context of mathematical population genetics and its applications to importance sampling algorithms with cloning. Job requirements: - Early stage researcher with background in mathematical physics, probability, statistical mechanics; - PhD in Mathematics or PhD in Physics (obtained or soon to be obtained); - shaped scientific personality, independent thinker; - author of recent publications on peer-reviewed international journals; - strong theoretical background but also an interest in application-oriented research. Salary: 27.429 euros (gross) per year. Application: The deadline for application is January 7th, 2014 and the position has to start before February 28th, 2014. Interested candidates can contact Prof. Cristian Giardina’ (cristian.giardina(a)unimore.it, +39 338 6115896). They are welcome to ask questions when filling in the application form. Please also include in your application the contact information of two researchers who are acquainted with your previous work. The call (english version) is available at: http://www.ufficioselezioneassunzione.unimore.it/site/home/assegni-di-ricer… The call (italian version) is available at: http://www.ufficioselezioneassunzione.unimore.it/site/home/assegni-di-ricer…

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Seminario di Probabilità - Università di Padova
by alessandra bianchi 09 Dec '13

09 Dec '13

Ho il piacere di invitarvi al seguente seminario che si terrà martedì 17 dicembre 2013 alle ore 15 nell'aula 1BC50 del Dipartimento di Matematica di Padova. Speaker: Prof. Fabio Martinelli , Dip. di Matematica, Università di Roma Tre Title: Time scales separation and dynamical heterogeneities in the East model. Abstract: The East model is a finite linear Markov chain of 0-1 spins, evolving according to a very simple rule: i) with rate 1 and independently for each vertex, a new value 1/0 is proposed with probability 1-q and q respectively; ii) the proposed value is accepted iff the spin immediately to the left is 0. The model and its generalizations play an important role as models of the dynamics of real glasses. The parameter q, which turns out to be the density of the zeros (the facilitating spins) in the stationary measure, is assumed to be very small. In the physical literature this setting corresponds to a low temperature case. We will examine the problem of dynamic heterogeneity, i.e. non-trivial spatio-temporal fluctuations of the local relaxation to equilibrium. A key result will be a very precise computation of the relaxation time of the chain as a function of q and of its length, which uses induction on length scales on one hand and a novel algorithmic lower bound on the other. Our findings reject non rigorous approaches based on numerical simulations. We will conclude with a conjecture due to D. Aldous and P. Diaconis about the scaling limit of the East chain as q-->0. Joint work with A. Faggionato and P. Chleboun -- Alessandra Bianchi Dip. di Matematica Pura e Applicata Università di Padova Via Trieste, 63 - 35121 Padova, Italy phone: +39 049 827 14 06 fax: +39 049 827 14 28 e-mail: bianchi(a)math.unipd.it http://www.math.unipd.it/~bianchi/

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Avviso di seminario :: DiSerio@DSS (Scienze Statistiche, Sapienza)
by Pierpaolo Brutti 09 Dec '13

09 Dec '13

----------------------------------------------------------------------------- A v v i s o d i S e m i n a r i o ----------------------------------------------------------------------------- Venerdì 13 Dicembre, ore 11am ----------------------------------------------------------------------------- Stanza 34 Dipartimento di Scienze Statistiche Sapienza Università di Roma CLELIA DI SERIO (Centro Universitario di Statistica per le Scienze Biomediche, Università Vita-Salute San Raffaele) terrà un seminario dal titolo INVESTIGATING TUMOR DORMANCY WITH FRAILTY 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 - Fulvio De Santis --- Summary A non-negligible percentage of cancer patients relapse after years or decades after surgical removal of the primary tumor. This phenomenon is not following a random memory-less process and its timing is reflected in hazard rates, with respect to both relapse and mortality, showing multimodal shapes. From a biomedical perspective, such a behavior may be explained by tumor dormancy, i.e. for some patients microscopic tumor foci may remain asymptomatic for a prolonged time interval and, when they escape from dormancy, micrometastatic growth results in a clinical disease appearance. The activation of the growth phase at different metastatic states would explain the occurrence of metastatic recurrences and mortality at different times (multimodal hazard). We place this phenomenon in the framework of survival frailty models. We propose a new statistical approach which models the risk function by considering possible effects of Gamma frailty and compound Poisson fraity in acting on components of the hazard function. Thus, the individual hazard rate is the product of a random frailty variable and the sum of basic hazard rates. The basic hazard rates correspond to micrometastatic developments starting from different initial states. The frailty variable represents the heterogeneity between patients with respect to relapse, which might be related to unknown mechanisms that regulate tumor dormancy. The model is applied to analyze the mortality of patients in a large breast cancer dataset. We show how this framework can appropriately model the tumor dormancy phenomenon and possibly improve the understanding of this biological process.

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Statistica Open Data e Società - Milano, 13 dicembre 2013
by Consonni Guido 06 Dec '13

06 Dec '13

Al termine dell'iniziativa "Statistica Open Data e Società", concorso a premi promosso dal Dipartimento di Scienze statistiche dell'Università Cattolica del Sacro Cuore in collaborazione con il Comune di Milano, nell'ambito delle celebrazioni per l'Anno Internazionale della Statistica, http://convegni.unicatt.it/meetings_2471.html<http://convegni.unicatt.it/meetings_2471.html,>, <http://convegni.unicatt.it/meetings_2471.htmlsi> si segnala l'evento "Come Open Data e Statistica possono aiutarci a conoscere e migliorare la società", in programma per venerdì 13 dicembre alle ore 18.00 presso l'Acquario Civico di Milano, nel corso del quale saranno premiati i vincitori. La partecipazione è libera, ma per motivi organizzativi si prega di segnalarla inviando una mail a dip.scienzestatistiche(a)unicatt.it<mailto:dip.scienzestatistiche@unicatt.it>. Di seguito il programma e altre informazioni. Venerdì 13 dicembre 2013, ore 18:00, Acquario Civico, Viale Gadio, 2 - Milano Saluti e introduzione: Cristina TAJANI Assessore alle Politiche per il lavoro, Sviluppo economico, Università e ricerca Guido CONSONNI Presidente della Giuria "Statistica, Open Data e Società", Università Cattolica del Sacro Cuore Alessandro ROSINA Direttore del Laboratorio di Statistica applicata alla decisioni economico-aziendali, Università Cattolica del Sacro Cuore Interventi: Nicola TORELLI Presidente della Società Italiana di Statistica, Marco ALFIERI Direttore de Linkiesta Presentazione dei prodotti vincitori del Contest "Statistica, Open Data e Società" Consegna dei premi da parte di Nunatac e Synergia Conclusioni: Cristina TAJANI Assessore alle Politiche per il lavoro, Sviluppo economico, Università e ricerca Brindisi finale

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Post-doc a Lione
by Francesco Caravenna 05 Dec '13

05 Dec '13

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% Post-doc positions - Mathematics and Computer Science in Lyon (labex MILYON) %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% See: http://milyon.universite-lyon.fr/offres-de-post-docs/2-post-doctoral-positi… Offer: MILYON (the Laboratoire d'Excellence "Mathématiques et Informatique à Lyon") offers four post-doctoral positions in mathematics and two in computer science for the academic year 2014-2015, to be held at the Unité de Mathématiques Pures et Appliquées or at the Laboratoire de l'Informatique du Parallélisme (École Normale Supérieure de Lyon), or at the Institut Camille Jordan (Université Claude Bernard Lyon 1). These are research-only appointments (without teaching). They are typically for two years, with possible renewal for a third year subject to review. The salary will be 2100 euros per month, with benefits including health insurance and social coverage. Funds will also be provided for traveling and inviting collaborators. Full description: More information can be found on the website of MILYON which contains links to the above three departments. It is requested to contact the colleagues in Lyon who are closest to your specialty. Eligibility: For holders of a Ph.D in mathematics or computer science obtained before October 1st, 2014. Deadline: Applications must be complete (including all reference letters) by: Wednesday, January 15th, 2014, at 17:00 (Lyon local time). How to apply? Applications must be submitted via the online form: http://math.univ-lyon1.fr/limesurvey/index.php?sid=32222&lang=en Requested items: Requested items: - a curriculum vitae; - a list of publications; - a scientific project (around two pages) specifying members of MILYON with whom you plan to interact primarily; - a short letter by a local mentor from Labex MILYON; - two detailed recommendation letters by scientists, not members of MILYON (one of them can be the thesis adviser). Contact: Administrative contact: Carine Sevestre <sevestre(a)math.univ-lyon1.fr> Only for scientific matters: Francis FILBET <filbet(a)math.univ-lyon1.fr>

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Corso al GSSI L'Aquila
by davide gabrielli 05 Dec '13

05 Dec '13

Presso il Grans Sasso Science Institute il giorno lunedi 8 dicembre alle ore 9 iniziera' il corso: Antonio Galves : "Context tree model selection with applications to neuro-sciences" e proseguira' fino a giovedi 19 dicembre con il seguente orario: Lunedi, Mercoledi e Giovedi dalle 9 alle 11 Martedi dalle 14 alle 16 -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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Seminario al SSSI
by davide gabrielli 05 Dec '13

05 Dec '13

AVVISO DI SEMINARIO AL GSSI - L'Aquila Giovedi 12 dicembre prossimo alle ore 16 presso il Gran Sasso Science Institute il *Prof. Paolo Dai Prà* terrà un seminario dal titolo: *Strategic interaction in trend-driven dynamics* *Abstract*: We propose a stochastic dynamics in which N agents update their state simultaneously but not independently. At each time step agents aim at maximizing their individual payoff, depending on their action, on the global trend of the system and on a random noise. In the limit of infinitely many agents, a law of large numbers is obtained; the limit dynamics consist in an implicit dynamical system, possibly multiple valued. For a special model, we determine the phase diagram for the long time behavior of these limit dynamics and we show the existence of a phase, where a locally stable fixed point coexists with a locally stable periodic orbit. -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.

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Seminari Yongdai KIM e Li MA
by Matteo Ruggiero 05 Dec '13

05 Dec '13

**************************************************************** STATISTICS SEMINARS - COLLEGIO CARLO ALBERTO **************************************************************** Giovedi' 12 dicembre 2013, a partire dalle ore 11:00, presso la sala rossa del Collegio Carlo Alberto, Moncalieri (TO), si terranno i seguenti seminari: h 11.00 Yongdai KIM (Seoul National University) DEVIANCE INFORMATION CRITERIA FOR THE FRAILTY MODEL h 12.00 LI MA (Duke University) ADAPTIVE TESTING OF CONDITIONAL ASSOCIATION THROUGH RECURSIVE MIXTURE MODELING Gli abstracts delle presentazioni possono essere consultati alla pagina http://www.carloalberto.org/events/seminars/statistics/ Tutti gli interessati sono invitati a partecipare. Il seminario e' organizzato dalla "de Castro" Statistics Initiative (http://www.carloalberto.org/stats) in collaborazione con il Collegio Carlo Alberto. Cordiali saluti, Matteo Ruggiero --------- Matteo Ruggiero University of Torino & Collegio Carlo Alberto http://web.econ.unito.it/ruggiero

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Summer school ABS14 on Applied Bayesian Nonparametrics
by raffaele argiento 03 Dec '13

03 Dec '13

Care colleghe e colleghi, vi trasmetto in allegato l'annuncio dell'undicesima edizione della scuola estiva ABS14 (Applied Bayesian Statistics). Il tema di quest'anno è "Applied Bayesian Nonparametric". Tutti gli interessati sono pregati di visitare il sito: http://www.mi.imati.cnr.it/conferences/abs14.html Cordialmente, Raffaele Argiento Direttore Esecutivo di ABS14 -- ======================================= Raffaele Argiento IMATI-CNR, Via Bassini 15, 20133 Milano Tel. +39 02 23699529 Fax. +39 02 23699538 e-mail: raffaele(a)mi.imati.cnr.it ========================================

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Random December 2013