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139 results on '"Castillo, Encarnación"'

3. End-to-End Ultrasonic Hand Gesture Recognition

Author

Fertl, Elfi, primary, Nguyen, Do Dinh Tan, additional, Krueger, Martin, additional, Stettinger, Georg, additional, Padial-Allué, Rubén, additional, Castillo, Encarnación, additional, and Cuéllar, Manuel P., additional

Published
2024
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6. Dry Laser‐Induced Graphene Fractal‐like ECG Electrodes.

Author

Houeix, Yann, Gerardo, Denice, Romero, Francisco J., Toral, Víctor, Hernandez, Lidia, Rivadeneyra, Almudena, Castillo, Encarnación, Morales, Diego P., and Rodriguez, Noel

Subjects
PHOTOTHERMAL effect, ELECTRODE performance, X-ray photoelectron spectroscopy, ELECTRODES, POLYIMIDE films, GRAPHENE
Abstract

Fractal‐like geometries applied to biosignal‐electrodes design show great potential for enhancing the signal acquisition of sensing systems. This study reports a novel approach for flexible, silver‐free, and dry fractal‐like electrodes based on Laser‐Induced Graphene (LIG) obtained through laser photothermal processing of a commercial polyimide film. This one‐step mask‐less manufacturing process enables the simple fabrication of natural and optimized fractal‐like shapes inspired by actual snowflake patterns. To ensure a reliable and standardized connection to the measurement unit, the electrodes are equipped with a snap terminal. The electrodes are structurally characterized using various techniques including Scanning Electron Microscopy (SEM), Raman spectroscopy, and X‐ray Photoelectron Spectroscopy (XPS). By benchmarking the performance of these electrodes against Ag/AgCl wet commercial electrodes and LIG electrodes shaped as commercial ones, a heart rate‐monitoring accuracy of over 96.8% is achieved, with high specificity, positive prediction, and sensitivity, surpassing the 95.8% achieved by conventional commercial electrodes. These results demonstrate the efficacy of fractal‐based designs in combination with LIG‐based transduction, offering flexible and cost‐effective electrocardiogram (ECG) electrodes with improved performance compared to traditional wet electrodes. [ABSTRACT FROM AUTHOR]

Published
2024
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11. Classification Algorithms for Fetal QRS Extraction in Abdominal ECG Signals

Author

Álvarez, Pedro, Romero, Francisco J., García, Antonio, Parrilla, Luis, Castillo, Encarnación, Morales, Diego P., Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Rojas, Ignacio, editor, and Ortuño, Francisco, editor

Published
2017
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17. Advanced concept for a crewed mission to the martian moons

Author

Conte, Davide, Di Carlo, Marilena, Budzyń, Dorota, Burgoyne, Hayden, Fries, Dan, Grulich, Maria, Heizmann, Sören, Jethani, Henna, Lapôtre, Mathieu, Roos, Tobias, Castillo, Encarnación Serrano, Schermann, Marcel, Vieceli, Rhiannon, Wilson, Lee, and Wynard, Christopher

Published
2017
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23. Efficient Clock Distribution Scheme for VLSI RNS-Enabled Controllers

Author

González, Daniel, Parrilla, Luis, García, Antonio, Castillo, Encarnación, Lloris, Antonio, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Paliouras, Vassilis, editor, Vounckx, Johan, editor, and Verkest, Diederik, editor

Published
2005
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26. Power-Efficient Implementation of Ternary Neural Networks in Edge Devices

Author

Molina Fernández, Miguel, Mendez Gomez, Javier, Morales, Diego, Castillo, Encarnación, López Vallejo, Marisa, Pegalajar, Manuel, Molina Fernández, Miguel, Mendez Gomez, Javier, Morales, Diego, Castillo, Encarnación, López Vallejo, Marisa, and Pegalajar, Manuel

Abstract

There is a growing interest in pushing computation to the edge, especially the problem-solving abilities of artificial neural networks (ANNs). This article presents a simplified method to obtain a ternary neural network based on the multilayer perceptron. The method is focused on resource-constrained devices, where memory, computing power, and battery are some of the most relevant constraints. A dynamic threshold is estimated to perform ternarization, and a new pruning technique is proposed to obtain a drastic reduction in the ANN’s size, with the corresponding decrease in resource utilization and power consumption of the resulting hardware. In addition, a support framework has been developed to automate hardware design exploration and generation from the network trained in software. Experimental results show that the proposed method and architecture, when implemented in a field-programmable gate array (FPGA), provide excellent figures in power (0.11–0.13 W) and efficiency (1225–1448 kfps/W) with respect to state of the art, being its efficiency double than the maximum one reported previously.

Published
2022

29. Intellectual Property Protection for RNS Circuits on FPGAs

Author

Parrilla, Luis, Castillo, Encarnación, García, Antonio, Lloris, Antonio, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Dough, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Becker, Jürgen, editor, Platzner, Marco, editor, and Vernalde, Serge, editor

Published
2004
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31. Properties of silver chloride and carbon screen printed patterns on different textiles.

Author

Toral, Victor, Albrecht, Andreas, Castillo, Encarnación, García, Antonio, Becherer, Markus, and Rivadeneyra, Almudena

Subjects
SCREEN process printing, SILVER chloride, TEXTILE patterns, ELECTRONIC equipment, ELECTROTEXTILES, TEXTILE technology, TEXTILE machinery
Abstract

Smart textiles, known also as e-textiles, are of great interest for the development of healthcare and wellness applications that require the embedding of electronic devices into the fabrics. Although many prototype proposals may be found in the literature, the generalization and commercialization of e-textiles is limited by the lack of cost-effective, standard fabrication processes that can be applied to a large variety of fabrics. In this contribution, we analyze the deposition of silver and carbon pastes by screen printing methods on a wide selection of daily-use textiles, to gain insight into the main features to be considered when developing cost-effective smart textiles. Results show the prospects offered by screen printing to create conductive patterns over textile and flexible materials with sheet resistances lower than 1 Ω/sq and a good repeatability in the dimensions of the patterns. [ABSTRACT FROM AUTHOR]

Published
2022
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34. Wearable System for Biosignal Acquisition and Monitoring Based on Reconfigurable Technologies

Author

Toral López, Víctor, García Ríos, Antonio, Romero Maldonado, Francisco Javier, Morales Santos, Diego Pedro, Castillo, Encarnación, Parrilla Roure, Luis, Gómez Campos, Francisco Manuel, Morillas, Antonio, and Rodríguez-Sánchez, Alejandro

Subjects
Reconfigurable instrumentation, Wearable instruments, ECG, Oxygen saturation
Abstract

Wearable monitoring devices are now a usual commodity in the market, especially for the monitoring of sports and physical activity. However, specialized wearable devices remain an open field for high-risk professionals, such as military personnel, fire and rescue, law enforcement, etc. In this work, a prototype wearable instrument, based on reconfigurable technologies and capable of monitoring electrocardiogram, oxygen saturation, and motion, is presented. This reconfigurable device allows a wide range of applications in conjunction with mobile devices. As a proof-of-concept, the reconfigurable instrument was been integrated into ad hoc glasses, in order to illustrate the non-invasive monitoring of the user. The performance of the presented prototype was validated against a commercial pulse oximeter, while several alternatives for QRS-complex detection were tested. For this type of scenario, clustering-based classification was found to be a very robust option., This work was funded by Banco Santander and Centro Mixto UGR-MADOC through project SIMMA (code 2/16). The contribution of Víctor Toral was funded by the University of Granada through a grant from the “Iniciación a la investigación 2016” program. The contribution of Antonio García was partially funded by Spain’s Ministerio de Educación, Cultura y Deporte (Programa Estatal de Promoción del Talento y su Empleabilidad en I+D+i, Subprograma Estatal de Movilidad, within Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016) under a “Salvador de Madariaga” grant (PRX17/00287). The contribution of Francisco J. Romero was funded by Spain’s Ministerio de Educación, Cultura y Deporte under a FPU grant (FPU16/01451). The contribution of Francisco M. Gómez-Campos was funded by Spain’s Ministerio de Economía, Industria y Competitividad under Project ENE2016_80944_R.

Published
2019

37. Flexible Laser-Reduced Graphene Oxide Thermistor for Ubiquitous Electronics

Author

Romero Maldonado, Francisco Javier, Rodriguez, Noel, Morales Santos, Diego Pedro, Ruiz, Francisco G., Castillo, Encarnación, and Rivadeneyra Torres, Almudena

Subjects
rGO, Thermistor, Hardware_INTEGRATEDCIRCUITS, SoC, Graphene, Flexible, Sensor
Abstract

This work presents a versatile sensing platform, intended for ubiquitous and flexible electronics based on a laser reduced-Graphene-Oxide thermistor. This technique enables the fast and ecological production of reduced Graphene Oxide without the need of masks or expensive lithography processes. The final transducer is fabricated on a flexible plastic substrate in order to use it as a superficial patch. Finally, a full demonstrator, which integrates this flexible thermistor with a low power System on Chip with wireless transmission, is presented., This work has been partially supported by the Spanish Ministry of Education, Culture and Sport (MECD) through the pre-doctoral grant FPU16/01451 , the National Excellence Research Project TEC2017-89955-P and the University of Granada through the scholarship ”Initiation to Research"

Published
2018

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