Listar por autor "Velasco-Álvarez, Francisco"
Mostrando ítems 1-20 de 31
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A two-class brain computer interface to freely navigate through virtual worlds
Ron-Angevin, Ricardo
; Díaz-Estrella, Antonio; Velasco-Álvarez, Francisco Javier (De Gruyter, 2009-05-26)
A brain computer interface that enables navigation through a virtual environment (VE) using four different navigation commands (turn right, turn left, move forward and move back) is presented. A graphical interface allows ... -
Audio-cued motor imagery-based brain–compute rinterface: Navigation through virtual and real environments
Velasco-Álvarez, Francisco Javier; Ron-Angevin, Ricardo; Da Silva-Sauer, Leandro; Sancha-Ros, Salvador (Elseiver, 2013-02-13)
he aim of this work is to provide a navigation paradigm that could be used to control a wheelchair through a brain-computer interface (BCI). In such a case, it is desirable to control the system without a graphical interface ... -
BCI-Based Navigation in Virtual and Real Environments
Velasco-Álvarez, Francisco Javier; Ron-Angevin, Ricardo; López-Gordo, Miguel Ángel (Springer, 2013-06)
A Brain-Computer Interface (BCI) is a system that enables people to control an external device with their brain activity, without the need of any muscular activity. Researchers in the BCI field aim to develop applications ... -
BCI-Controlled Wheelchair; Audio-Cue Motor Imagery-Based Paradigm
Velasco-Álvarez, Francisco Javier; Varona-Moya, Sergio; Blanca-Mena, María José; Sancha-Ros, Salvador; Ron-Angevin, Ricardo (2014-10-22)
In this study we present a control paradigm that enables subjects to drive a real wheelchair using four navigation commands. The control is achieved through the discrimination of two mental tasks (relaxed state versus one ... -
Brain switch mode: an alternative to drive a brain-controlled wheelchair
To date, different control paradigms of low level navigation have been tested for brain-controlled wheelchairs, mainly divided into continuous or discrete control [1]. However, these paradigms have certain drawbacks such ... -
Brain-computer interface (BCI)-generated speech to control domotic devices
Velasco-Álvarez, Francisco Javier; Fernández-Rodríguez, Álvaro; Ron-Angevin, Ricardo (Elsevier, 2022-10-14)
A brain-computer interface (BCI) is a type of technology that establishes a communication channel between a user and certain devices in the environment via the brain signals of the user. The UMA-BCI Speller tool allows for ... -
Brain-Computer Interface Control of Smartphone Messaging Applications
Velasco-Álvarez, Francisco Javier; Fernández-Rodríguez, Álvaro; Ron-Angevin, Ricardo (IARIA, 2021-07)
This work-in-progress paper presents an implementation of a Brain-Computer Interface (BCI) system focused on the control of the most common messaging applications of a smartphone: WhatsApp, Telegram, e-mail and Short Message ... -
Brain-Controlled Wheelchair Through Discrimination of Two Mental Tasks
Recently, Brain-Computer Interface (BCI) research has been targeted at the rehabilitation of motor-disabled individuals because it helps to establish a communication and control channel for them. This new channel could ... -
Control de una silla de ruedas a través de un sistema BCI basado en la discriminación de dos tareas mentales
Ron-Angevin, Ricardo; Velasco-Álvarez, Francisco Javier; Varona-Moya, Sergio; Vizcaíno-Martín, Francisco Javier; Díaz-Estrella, Antonio (2014-07-22)
En este trabajo se presenta una propuesta de control de una silla de ruedas a través de una interfaz cerebro computadora mediante la discriminación de sólo dos tareas mentales. Con el paradigma de control propuesto se ... -
Different effects of using pictures as stimuli in a P300 brain-computer interface under rapid serial visual presentation or row-column paradigm
Fernández-Rodríguez, Álvaro; Medina-Juliá, María Teresa; Velasco-Álvarez, Francisco Javier; Ron-Angevin, Ricardo (Springer Nature, 2021-03-20)
Previous proposals for controlling a P300-based BCI speller have shown an improvement using alternative images instead of letters as target stimuli under a row–column paradigm (RCP). However, the RCP is not suitable for ... -
Effect of Stimulus Size in a Visual ERP-Based BCI under RSVP
Fernández-Rodríguez, Álvaro; Darves-Bornoz, Aube; Velasco-Álvarez, Francisco Javier; Ron-Angevin, Ricardo (MPDI, 2022)
Rapid serial visual presentation (RSVP) is currently one of the most suitable paradigms for use with a visual brain–computer interface based on event-related potentials (ERP-BCI) by patients with a lack of ocular motility. ... -
Effects of spatial stimulus overlap in a visual P300-based brain-computer interface
Fernández-Rodríguez, Álvaro; Medina-Juliá, María Teresa; Velasco-Álvarez, Francisco Javier; Ron-Angevin, Ricardo (Elsevier, 2020-02-18)
The rapid serial visual presentation (RSVP) paradigm seems to be one of the most appropriate for patients using P300-based brain-computer interface applications, since non-ocular movements are required. However, according ... -
Estudio preliminar de la usabilidad de tres tamaños de teclados basados en Interfaces Cerebro-Computador por pacientes con ELA
Medina-Juliá, María Teresa; Fernández-Rodríguez, Álvaro; Velasco-Álvarez, Francisco Javier; Ron-Angevin, Ricardo (2019-07-25)
En referencia a los teclados basados en Interfaces Cerebro Computador que utilizan el biopotencial P300 como señal de control, el tamaño óptimo para personas con discapacidad motora no se ha presentado propiamente. En este ... -
Evaluation of emotional and neutral pictures as flashing stimuli using a P300 brain-computer interface speller
Fernández-Rodríguez, Álvaro; Velasco-Álvarez, Francisco Javier; Medina-Juliá, María Teresa; Ron-Angevin, Ricardo (IOP Publishing, 2019-09-11)
Previous works have reported that complex emotional and visual stimuli can increase the amplitude of the P300 brain potential. Thus, the aim of the present work is to assess these kinds of images in a P300 brain-computer ... -
Evaluation of flashing stimuli shape and colour heterogeneity using a P300 brain-computer interface speller
Fernández-Rodríguez, Álvaro; Velasco-Álvarez, Francisco Javier; Medina-Juliá, María Teresa; Ron-Angevin, Ricardo (2019-07-17)
Objective: Previous works using a visual P300-based speller have reported an improvement modifying the shape or colour of the presented stimulus. However, the effects of both blended factors have not been yet studied. Thus, ... -
Evaluation of Single-Trial Classification to Control a Visual ERP-BCI under a Situation Awareness Scenario.
Fernández-Rodríguez, Álvaro; Ron-Angevin, Ricardo; Velasco-Álvarez, Francisco Javier; Diaz-Pineda, Jaime; Letouzé, Théodore; André, Jean-Marc[et al.] (MDPI, 2023-05-31)
An event-related potential (ERP)-based brain–computer interface (BCI) can be used to monitor a user’s cognitive state during a surveillance task in a situational awareness context. The present study explores the use of an ... -
Evaluation of visual parameters to control a visual ERP-BCI under single-trial classification
Fernández-Rodríguez, Álvaro; Ron-Angevin, Ricardo; Velasco-Álvarez, Francisco Javier; Diaz-Pineda, Jaime; Letouzé, Théodore; André, Jean-Marc[et al.] (2023)
A brain-computer interface (BCIs) based on event-related potentials (ERPs) is a technology that provides a communication channel between a device and a user through their brain activity. These systems could be used to ... -
Exploring the impact of stimulus transparency in ERP-BCI under RSVP.
Fernández-Rodríguez, Álvaro; Velasco-Álvarez, Francisco Javier; Alvarez, Chloé; Langin, Célia; Letouzé, Théodore; André, Jean-Marc; Ron-Angevin, Ricardo[et al.] (ACM Library Digital, 2024)
Rapid serial visual presentation (RSVP) is currently one of the most suitable paradigms for implementing a visual brain–computer interface based on event-related potentials (ERP-BCI) for patients with limited ocular ... -
Free Virtual Navigation Using Motor Imagery Through an Asynchronous Brain–Computer Interface
Velasco-Álvarez, Francisco Javier; Ron-Angevin, Ricardo; Blanca-Mena, María José (MIT Press, 2010-02)
In this paper, an asynchronous brain-computer interface is presented that enables the control of a wheelchair in virtual environments using only one motor imagery task. The control is achieved through a graphical intentional ... -
Posible efecto de interacción entre el paradigma de presentación y el conjunto de estímulos en un teclado virtual controlado a través de una interfaz cerebro-ordenador basada en P300
Fernández-Rodríguez, Álvaro; Medina-Juliá, María Teresa; Velasco-Álvarez, Francisco Javier; Ron-Angevin, Ricardo (2019-07-25)
Muchos trabajos en spellers basados en señal P300 visual han presentado estímulos novedosos que mejoraron el rendimiento utilizando el paradigma fila-columna (RCP). Sin embargo, la presentación visual serial rápida (RSVP) ...