[Todos] Invitación Seminario a cargo del Prof. Dr. Pablo Levy - martes 22 de julio 11h.

[Angela Candreva]

Estimada comunidad, 




Quedan todas/os invitadas/os al próximo seminario a realizarse el próximo martes 22 de julio a las 11 h. 



El mismo estará a cargo del Prof. Dr. Pablo Levy Pablo Levy, CNEA-Bariloche y Facultad de Ciencia y Tecnología (UNSAM-Buenos Aires). 



Su charla se titula: 



Brain-like electronics 



Se envía a continuación un breve resumen: 

The presence of neurons and synapses is a unique characteristic of the biological brain. We explore the electrical response of self assembled Ag-PVP based nanowire (NW) networks as a hardware platform to perform computational tasks in a brain inspired (neuromorphic) way. 



The electrical circuit is modeled as a random network consisting of resistors (the NWs) and memristors (formed at the NW-NW junctions). The motivation is both morphological and functional, as memristors emulate synaptic processes: they can codify "weights" in their non volatile resistance values. 



Nanowires have a metallic core (Ag) and an insulating wrapper (PVP). Under the influence of low electric field the Ag ions realize Conductive Filaments (CF) across the insulating layer. Upon increasing the stimulus the NWs can electrically connect and disconnect as a result of the competition between field induced electromigration of Ag ions - that builds up CFs- and their heat induced dissolution. By biasing the system at this noisy regime, the Resistive Switching effect becomes the source of spikes. Interestingly, the dynamics of the formation and disruption of filaments unveils collective properties of the system. 



We show that - by properly driving the stimulus- it is possible to have both neuron emulators and synapse emulators in the same sample. This fact envisages a brain inspired electronics capable of processing information "in materia" triggered by external stimulus that biases neurons, which in turn produce spikes that modulate their synaptic weights. 



Thus, the capability of learning emerges as a natural consequence of receiving and processing information. In this scenario neuromorphic computation capabilities with additional functionalities are envisaged. 





El evento tendrá lugar en el auditorio ¨Prof. Dr. Luis N. Epele¨ del IFLP, sito en la diagonal 113 entre 63 y 64. 





Adjuntamos también flyer del evento del cual agradeceremos su difusión. 
















Sobre el disertante: 




Pablo Levy (born 1962) is Principal Research Professor at CNEA, CONICET and UNSAM (Argentina), where he presently leads research at the Devices and Sensors Group (CNEA-Bariloche), and at the School of Science and Technology (UNSAM-Buenos Aires). His professional interest focuses on device physics: electrical transport in condensed matter (experimental and modelling). He is co-author of 100 + publications, has supervised 12 PhD Theses and has been the leader of several research projects (Manganitas, MeMO, LaboSat, CEpAS, NeNA, RdM) and related conferences (MMMM06, EPICO2012, WAS2018). His work has focused on the fabrication and characterization of emerging electronic devices for applications in hostile environments (aerospace, nuclear) and memristors for neuromorphic computing. 









Esperamos contar con su presencia. 







Saludos cordiales, 







Dra. Ángela M. Candreva 

Secretaría Científica y de Vinculación 

Instituto de Física La Plata (IFLP – UNLP - CONICET). 

Diag. 113 e 63 y 64 s/n. La Plata - Bs. As. – Argentina. 

e-mail: acandreva en iflp.unlp.edu.ar 
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