Random March 2015

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32 participants
44 discussions

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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Second Juelich-Torino Workshop on Computational Neuroscience
by Roberta Sirovich 20 Mar '15

20 Mar '15

The second *Juelich-Torino* Workshop on *Computational Neuroscience* will be held on *April 17, 2015 * *at the Department of Mathematics "G. Peano", Torino University * For more information please visit: http://www.dipmatematica.unito.it/unitoWAR/page/dipartimenti1/D005/D005_jul… Participation is free. All people interested to participate are invited to register, sending an e-mail to laura.sacerdote(a)unito.it Best regards, Roberta Sirovich -- --------------------------------------------------- Roberta Sirovich Department of Mathematics G. Peano University of Torino Via Carlo Alberto 10 10123 Torino (Italy) +390116702937 www.robertasirovich.it <http://www.personalweb.unito.it/roberta.sirovich/EN/Home.html> ---------------------------------------------------

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Secondo seminario di Elena Kosygina
by Mariani, Mauro 19 Mar '15

19 Mar '15

In aggiungta al seminario gia' segnalato di Mercoledi' 25, il giorno Venerdi' 27 Marzo 2015 alloe ore 15:00, nell'Aula INdAM del Dipartimento di Matematica dell'Universita' di Roma La Sapienza Elena Kosygina (Baruch College and the CUNY Graduate Center) effettuera' un seminario dal titolo: *On the connection between homogenization of some stochastic Hamilton-Jacobi-Bellman equations and large deviations of diffusions with random drift in a random potential* Sunto del seminario: The connection mentioned in the title is well-known (see, for example, A.-S. Sznitman, Brownian motion in a Poissonian potential, 1993, PTRF). The goal of the talk is to review some necessary facts from large deviations theory and explain that this connection is actually an equivalence. Un saluto Mauro Mariani

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1st announcement - 39th AMASES Meeting
by Tiziano Vargiolu 18 Mar '15

18 Mar '15

39th AMASES Padova, March 18, 2015 PADOVA Dear colleagues, we are pleased to announce the 39th Annual Meeting of the Italian Association for Mathematics Applied to Economic and Social Sciences (AMASES). The meeting will take place at the University of Padova, Italy, on September 10-12, 2015. As in the AMASES established tradition, the Meeting objective is to keep open a discussion forum among scholars and practitioners from Italy and all around the world, working on different aspects of Mathematics applied to Economic and Social Sciences. The three day scientific program will consist of plenary talks and presentations of contributed papers on Financial Mathematics, Decision Theory, Mathematics for Economics, Actuarial Mathematics, Game Theory, Optimization and Economics. The invited plenary speakers are Jean-Marc Bonnisseau (Paris 1, Sorbonne), Mich?le Breton (HEC Montr?al), Juan Enrique Martinez-Legaz (Universitat Aut?noma de Barcelona), Kiminori Matsuyama (Northwestern University), Wolfgang Runggaldier (Universit? degli Studi di Padova, Emerito). The web-site of the meeting will be available soon with further information, in particular on abstract submission, registration and deadline s. I look forward to your participation in the 39th AMASES Meeting in Padova. On behalf of the Organising Committee, Bruno Viscolani -- Prof. Bruno Viscolani Dipartimento di Matematica Universit? degli Studi di Padova via Trieste, 63 35121 Padova - Italy tel. +39 049 827 1397 e-mail: viscolani(a)math.unipd.it Tiziano -------------------------------------------------------------------------- Tiziano Vargiolu Dipartimento di Matematica Phone: +39 049 8271383 Universita' di Padova Fax: +39 049 8271428 Via Trieste, 63 E-mail: vargiolu(a)math.unipd.it I-35121 Padova (Italy) WWW: http://www.math.unipd.it/~vargiolu --------------------------------------------------------------------------

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Econophysics Colloquium 2015
by Enrico Scalas 18 Mar '15

18 Mar '15

Call for Abstracts: Econophysics Colloquium 2015 Dear Colleague, We warmly invite you to participate in the 11th Econophysics Colloquium (EC2015) which is held at the Institute of Economic Studies, Charles University in Prague, Czech Republic between 14-16 September 2015. To submit your abstract and for additional information, please visit http://www.ec2015.org. CONFERENCE TOPICS Conference topics traditionally cover the applications of methods and modeling paradigms from physics and natural sciences to socio-economic problems. The topics include but are not limited to: Agent-based models in economics and finance Complex systems and complex networks Computational experimental finance Derivatives pricing and hedging Evolutionary game theory Financial engineering Fractal and multifractal analysis and modeling Market dynamics, macroscopic models and prediction Market microstructure Risk management & portfolio analysis Statistical and probabilistic methods in economics and finance Social physics and Sociophysics Stylized facts INVITED SPEAKERS Tomaso Aste (University College London, UK) Jozef Barunik (Charles University in Prague & Czech Academy of Sciences) Siew Ann Cheong (Nanyang Technological University, Singapore) Tiziana Di Matteo (King's College London, UK) Dariusz Grech (University of Wroclaw, Poland) Giulia Iori (City University, London, UK) Woo Sung Jung (POSTECH, Pohang, South Korea) Janos Kertesz (Budapest University of Technology and Economics, Hungary) Ladislav Kristoufek (Charles University in Prague & Czech Academy of Sciences) Reimer Kuehn (King's College London, UK) Sai-Ping Li (Academia Sinica, Taipei, Taiwan) Suzy Moat (University of Warwick, UK) Luciano Pietronero (University of Rome, Italy) Tobias Preis (University of Warwick, UK) Enrico Scalas (University of Sussex, UK) Frank Schweitzer (ETH Zurich, Switzerland) H. Eugene Stanley (Boston University, USA) Hideki Takayasu (Sony CSL & Meiji University, Japan) Misako Takayasu (Tokyo Institute of Technology, Japan) Stefan Thurner (Medical University of Vienna, Austria) Wei-Xing Zhou (East China University of Science and Technology, China) IMPORTANT DATES Abstract submission opens: 16th March 2015 Abstract submission closes: 15th May 2015 Decision: 31st May 2015 Deadline for early-bird registration: 15th June 2015 Deadline for regular registration: 15th July 2015 We look forward to meeting you in Prague. With warm wishes, EC2015 organizers

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Cancellazione seminario Puccetti@DSS
by Pierpaolo Brutti 18 Mar '15

18 Mar '15

Brevissimo msg solo per comunicare che il seminario di Giovanni Puccetti previsto per venerdì 20 marzo in Sapienza è *annullato* per motivi di salute dello speaker. Cordialmente --P

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Seminario Lorenzo Peccati a Macerata il 25 marzo 2015
by Roy Cerqueti 17 Mar '15

17 Mar '15

Cari colleghi, mercoledì 25 marzo 2015 ore 11, presso lUniversità di Macerata, in aula verde (Polo Pantaleoni, Via della Pescheria Vecchia) Lorenzo Peccati dell'Università Bocconi di Milano terrà un seminario dal titolo: Diritto e matematica: due mondi disgiunti? Tutti gli interessati sono invitati a partecipare.

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Seminario Elena Kosygina
by Mariani, Mauro 17 Mar '15

17 Mar '15

Il giorno Mercoledi' 25 marzo 2015, alle ore 14:00, nell'Aula G del Dipartimento di Matematica dell'Universita' la Sapienza di Roma Elena Kosygina (Baruch College and the CUNY Graduate Center) effettuera' un seminario di circa un'ora: TITOLO: Excited random walks in Markovian cookie environments on Z SUNTO: We consider a nearest-neighbor random walk on Z whose probability ω(x, n) to jump to the right from site x depends not only on x but also on the number of prior visits n to x. The collection (ω(x, n)) is sometimes called the “cookie environment” due to the following informal interpretation. Upon each visit to a site the walker eats a cookie from the cookie stack at that site and chooses the probability to jump to the right according to the “flavour” of the cookie eaten. Assume that the cookie stacks are i.i.d. and that only the first M cookies in each stack may have “flavour”. All other cookies are assumed to be “plain”, i.e. after their consumption the walker makes unbiased steps to one of its neighbours. The “flavours” of the first M cookies within the stack can be different and dependent. We discuss recurrence/transience, ballisticity, and limit theorems for such walks. The talk is based on joint works with Dolgopyat (University of Mary-land), Mountford, Zerner. Tutti gli interessati sono invitati a partecipare Un saluto Mauro Mariani

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