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Browsing by Author "Ardid Ramírez, Joan Salvador"

Now showing items 1-19 of 19

A computational psychiatry approach identifies how alpha-2A noradrenergic agonist Guanfacine affects feature-based reinforcement learning in the macaque

Hassani, S. A.; Oemisch, M.; Balcarras, M.; Westendorff, S.; Ardid-Ramírez, Joan Salvador; van der Meer, M. A.; Tiesinga, P.; Womelsdorf, T. (Nature Publishing Group, 2017-01-16)

[EN] Noradrenaline is believed to support cognitive flexibility through the alpha 2A noradrenergic receptor (a2A-NAR) acting in prefrontal cortex. Enhanced flexibility has been inferred from improved working memory with ...
A tweaking principle for executive control: neuronal circuit mechanism for rule-based task switching and conflict resolution

Ardid-Ramírez, Joan Salvador; Wang, Xiao-Jing (Society for Neuroscience, 2013-12-11)

[EN] A hallmark of executive control is the brain's agility to shift between different tasks depending on the behavioral rule currently in play. In this work, we propose a "tweaking hypothesis" for task switching: a weak ...
An integrated microcircuit model of attentional processing in the neocortex

Ardid-Ramírez, Joan Salvador; Wang, Xiao-Jing; Compte, A. (Society for Neuroscience, 2007-08-08)

[EN] Selective attention is a fundamental cognitive function that uses top-down signals to orient and prioritize information processing in the brain. Single-cell recordings from behaving monkeys have revealed a number of ...
Análisis del cambio repentino a docencia remota por la COVID-19 en los resultados de aprendizaje: caso de dos asignaturas anuales básicas en Grados de Ingeniería

Ardid Ramírez, Miguel; Ardid Ramírez, Joan Salvador; Herrero Debón, Alicia (Editorial Universitat Politècnica de València, 2021-09-28)

[EN] In this article we analyse the experience in two basic annual subjects in Engineering Degrees with the aim of determining if there are differences in the degree of achievement of the learning objectives, due to the ...
Anterior cingulate cortex cells identify process-specific errors of attentional control prior to transient prefrontal-cingulate inhibition

Shen, C.; Ardid-Ramírez, Joan Salvador; Kaping, D.; Westendorff, S.; Everling, S.; Womelsdorf, T. (Oxford University Press, 2015-08)

[EN] Errors indicate the need to adjust attention for improved future performance. Detecting errors is thus a fundamental step to adjust and control attention. These functions have been associated with the dorsal anterior ...
Attentional selection can be predicted by reinforcement learning of task-relevant stimulus features weighted by value-independent stickiness

Balcarras, M.; Ardid-Ramírez, Joan Salvador; Kaping, D.; Everling, S.; Womelsdorf, T. (MIT Press, 2016-02-01)

[EN] Attention includes processes that evaluate stimuli relevance, select the most relevant stimulus against less relevant stimuli, and bias choice behavior toward the selected information. It is not clear how these processes ...
Biased competition in the absence of input bias revealed through corticostriatal computation

Ardid-Ramírez, Joan Salvador; Sherfey, Jason S.; McCarthy, Michelle M.; Hass, Joachim; Pittman-Polletta, Benjamin R.; Kopell, Nancy (Proceedings of the National Academy of Sciences, 2019-04-23)

[EN] Classical accounts of biased competition require an input bias to resolve the competition between neuronal ensembles driving downstream processing. However, flexible and reliable selection of behaviorally relevant ...
Burst firing synchronizes prefrontal and anterior cingulate cortex during attentional control

Womelsdorf, T.; Ardid-Ramírez, Joan Salvador; Everling, S.; Valiante, T. (Elsevier, 2014-11-17)

[EN] Background: It is widely held that single cells in anterior cingulate and lateral prefrontal cortex (ACC/PFC) coordinate their activity during attentional processes, although cellular activity that may underlie such ...
Data analysis in underwater neutrino telescopes using advanced machine learning tools

Aslan Suárez, Antonio Alejandro (Universitat Politècnica de València, 2021-09-02)

[ES] Las radiaciones electromagnéticas no son la única forma que el ser humano tiene para estudiar los astros, de hecho, el estudio de la trayectoria de los neutrinos que llegan a la Tierra puede permitir el estudio de ...
DynaSim: a MATLAB toolbox for neural modeling and simulation

Sherfey, Jason S.; Soplata, Austin E.; Ardid-Ramírez, Joan Salvador; Roberts, Erik A.; Stanley, David A.; Pittman-Polletta, Benjamin R.; Kopell, Nancy J. (Frontiers Media SA, 2018-03-15)

[EN] DynaSim is an open-source MATLAB/GNU Octave toolbox for rapid prototyping of neural models and batch simulation management. It is designed to speed up and simplify the process of generating, sharing, and exploring ...
Estudio del meta-aprendizaje como alternativa a la disyuntiva entre el aprendizaje por refuerzo basado en modelo y el aprendizaje por refuerzo sin modelo

Miguez Quintela, Imanol (Universitat Politècnica de València, 2022-06-09)

[ES] Se comparará la eficiencia, ventajas y desventajas, de diferentes algoritmos de aprendizaje por refuerzo ("reinforcement learning", RL), tales como el refuerzo basado en modelo (model-based RL), el refuerzo sin modelo ...
Feature-specific prediction errors and surprise across macaque fronto-striatal circuits

Oemisch, M.; Westendorff, S.; Azimi, Marzyeh; Hassani, Seyed Alireza; Ardid-Ramírez, Joan Salvador; Tiesinga, Paul; Womelsdorf, Thilo (Nature Publishing Group, 2019-01-11)

[EN] To adjust expectations efficiently, prediction errors need to be associated with the precise features that gave rise to the unexpected outcome, but this credit assignment may be problematic if stimuli differ on multiple ...
Flexible resonance in prefrontal networks with strong feedback inhibition

Sherfey, Jason S.; Ardid-Ramírez, Joan Salvador; Hass, Joachim; Hasselmo, Michael E.; Kopell, Nancy J. (Public Library of Science, 2018-08-09)

[EN] Oscillations are ubiquitous features of brain dynamics that undergo task-related changes in synchrony, power, and frequency. The impact of those changes on target networks is poorly understood. In this work, we used ...
Mapping of functionally characterized cell classes onto canonical circuit operations in primate prefrontal cortex

Ardid-Ramírez, Joan Salvador; Vinck, M.; Kaping, D.; Marquez, S.; Everling, S.; Womelsdorf, T. (Society for Neuroscience, 2015-02-18)

[EN] Microcircuits are composed of multiple cell classes that likely serve unique circuit operations. But how cell classes map onto circuit functions is largely unknown, particularly for primate prefrontal cortex during ...
Prefrontal oscillations modulate the propagation of neuronal activity required for working memory

Sherfey, Jason; Ardid-Ramírez, Joan Salvador; Miller, Earl K.; Hasselmo, Michael E.; Kopell, Nancy J. (Elsevier, 2020-09)

[EN] Cognition involves using attended information, maintained in working memory (WM), to guide action. During a cognitive task, a correct response requires flexible, selective gating so that only the appropriate information ...
Reconciling coherent oscillation with modulation of irregular spiking activity in selective attention: gamma-range synchronization between sensory and executive cortical areas

Ardid-Ramírez, Joan Salvador; Wang, Xiao-Jing; Gomez-Cabrero, D.; Compte, A. (Society for Neuroscience, 2010-02-24)

[EN] In this computational work, we investigated gamma-band synchronization across cortical circuits associated with selective attention. The model explicitly instantiates a reciprocally connected loop of spiking neurons ...
Reconstrucción de trayectorias en telescopios submarinos de neutrinos mediante técnicas de machine learning

Rocabado Rocha, José Luís (Universitat Politècnica de València, 2020-10-28)

[ES] Se utilizarán técnicas de machine learning para determinar la dirección de llegada de los neutrinos detectados por los sensores del telescopio submarino ANTARES (http://antares.in2p3.fr). Para ello se analizará un ...
The KM3NeT potential for the next core-collapse supernova observation with neutrinos

Aiello, S.; Albert, A.; Garre, S. Alves; Aly, Z.; Ambrosone, A.; Ameli, F.; Andre, M.; Androulakis, G.; Anghinolfi, M.; Anguita, M.; Anton, G.; Ardid Ramírez, Miguel; Ardid-Ramírez, Joan Salvador; Aublin, J.; Bagatelas, C.; Bou Cabo, Manuel; Diego-Tortosa, Dídac; Espinosa Roselló, Víctor; Martínez Mora, Juan Antonio; Poirè, Chiara (Springer-Verlag, 2021-05)

[EN] The KM3NeT research infrastructure is under construction in the Mediterranean Sea. It consists of two water Cherenkov neutrino detectors, ARCA and ORCA, aimed at neutrino astrophysics and ...
Use of sound recordings and analysis for physics lab practices

Ardid-Ramírez, Joan Salvador; Marquez, Susanna; Ardid Ramírez, Miguel (IATED, 2021-03-09)

[EN] The study of oscillations, waves, and sound is included in most first-year courses on Physics, however, analyzing audio recordings to understand and test physics experiments in laboratory practices is not a common ...